./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/fragtest_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/fragtest_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:17:41,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:17:41,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:17:41,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:17:41,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:17:41,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:17:41,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:17:41,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:17:41,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:17:41,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:17:41,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:17:41,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:17:41,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:17:41,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:17:41,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:17:41,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:17:41,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:17:41,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:17:41,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:17:41,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:17:41,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:17:41,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:17:41,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:17:41,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:17:41,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:17:41,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:17:41,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:17:41,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:17:41,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:17:41,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:17:41,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:17:41,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:17:41,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:17:41,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:17:41,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:17:41,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:17:41,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:17:41,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:17:41,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:17:41,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:17:41,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:17:41,821 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:17:41,865 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:17:41,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:17:41,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:17:41,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:17:41,867 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:17:41,867 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:17:41,868 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:17:41,868 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:17:41,874 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:17:41,875 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:17:41,876 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:17:41,876 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:17:41,876 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:17:41,876 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:17:41,877 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:17:41,877 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:17:41,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:17:41,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:17:41,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:17:41,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:17:41,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:17:41,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:17:41,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:17:41,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:17:41,880 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:17:41,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:17:41,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:17:41,880 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:17:41,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:17:41,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:17:41,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:17:41,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:17:41,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:17:41,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:17:41,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:17:41,883 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:17:41,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:17:41,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:17:41,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:17:41,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:17:41,884 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e [2021-11-12 23:17:42,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:17:42,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:17:42,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:17:42,239 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:17:42,239 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:17:42,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2021-11-12 23:17:42,321 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/data/6613ac563/1ff39460ed6f41fcbb515762a4ac9855/FLAG5ebff0c57 [2021-11-12 23:17:42,838 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:17:42,839 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2021-11-12 23:17:42,845 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/data/6613ac563/1ff39460ed6f41fcbb515762a4ac9855/FLAG5ebff0c57 [2021-11-12 23:17:43,212 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/data/6613ac563/1ff39460ed6f41fcbb515762a4ac9855 [2021-11-12 23:17:43,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:17:43,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:17:43,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:17:43,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:17:43,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:17:43,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:17:43" (1/1) ... [2021-11-12 23:17:43,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ceb58d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43, skipping insertion in model container [2021-11-12 23:17:43,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:17:43" (1/1) ... [2021-11-12 23:17:43,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:17:43,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:17:43,441 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2021-11-12 23:17:43,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:17:43,462 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:17:43,475 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2021-11-12 23:17:43,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:17:43,494 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:17:43,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43 WrapperNode [2021-11-12 23:17:43,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:17:43,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:17:43,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:17:43,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:17:43,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43" (1/1) ... [2021-11-12 23:17:43,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43" (1/1) ... [2021-11-12 23:17:43,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:17:43,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:17:43,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:17:43,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:17:43,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43" (1/1) ... [2021-11-12 23:17:43,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43" (1/1) ... [2021-11-12 23:17:43,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43" (1/1) ... [2021-11-12 23:17:43,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43" (1/1) ... [2021-11-12 23:17:43,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43" (1/1) ... [2021-11-12 23:17:43,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43" (1/1) ... [2021-11-12 23:17:43,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43" (1/1) ... [2021-11-12 23:17:43,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:17:43,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:17:43,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:17:43,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:17:43,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43" (1/1) ... [2021-11-12 23:17:43,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:17:43,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:43,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:17:43,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:17:43,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:17:43,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:17:43,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:17:43,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:17:43,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:17:43,808 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-12 23:17:43,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:17:43 BoogieIcfgContainer [2021-11-12 23:17:43,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:17:43,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:17:43,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:17:43,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:17:43,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:17:43" (1/3) ... [2021-11-12 23:17:43,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255b722b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:17:43, skipping insertion in model container [2021-11-12 23:17:43,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:43" (2/3) ... [2021-11-12 23:17:43,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255b722b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:17:43, skipping insertion in model container [2021-11-12 23:17:43,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:17:43" (3/3) ... [2021-11-12 23:17:43,820 INFO L111 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2021-11-12 23:17:43,826 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:17:43,826 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:17:43,876 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:17:43,884 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:17:43,885 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:17:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:43,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:17:43,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:43,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:43,907 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:43,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1621408492, now seen corresponding path program 1 times [2021-11-12 23:17:43,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:17:43,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630490592] [2021-11-12 23:17:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:43,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:17:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:44,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:17:44,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630490592] [2021-11-12 23:17:44,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630490592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:44,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:44,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:17:44,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551013354] [2021-11-12 23:17:44,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:44,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:17:44,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:17:44,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:17:44,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:17:44,114 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-11-12 23:17:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:44,137 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2021-11-12 23:17:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:17:44,140 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 [2021-11-12 23:17:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:44,147 INFO L225 Difference]: With dead ends: 27 [2021-11-12 23:17:44,148 INFO L226 Difference]: Without dead ends: 13 [2021-11-12 23:17:44,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:17:44,154 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.41ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:44,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 4 Unknown, 0 Unchecked, 0.41ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 9.35ms Time] [2021-11-12 23:17:44,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-12 23:17:44,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-12 23:17:44,185 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) [2021-11-12 23:17:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-12 23:17:44,187 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-11-12 23:17:44,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:44,188 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-12 23:17:44,188 INFO L471 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) [2021-11-12 23:17:44,188 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-12 23:17:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 23:17:44,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:44,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:44,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:17:44,190 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:44,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:44,191 INFO L85 PathProgramCache]: Analyzing trace with hash -134467088, now seen corresponding path program 1 times [2021-11-12 23:17:44,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:17:44,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510053488] [2021-11-12 23:17:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:44,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:17:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:44,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:17:44,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510053488] [2021-11-12 23:17:44,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510053488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:44,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:44,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:17:44,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295955850] [2021-11-12 23:17:44,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:44,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:17:44,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:17:44,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:17:44,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:17:44,321 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:44,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:44,378 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-12 23:17:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:17:44,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-12 23:17:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:44,380 INFO L225 Difference]: With dead ends: 18 [2021-11-12 23:17:44,380 INFO L226 Difference]: Without dead ends: 16 [2021-11-12 23:17:44,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:17:44,383 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:44,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 21 Invalid, 16 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 34.01ms Time] [2021-11-12 23:17:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-12 23:17:44,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-12 23:17:44,392 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) [2021-11-12 23:17:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-12 23:17:44,395 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2021-11-12 23:17:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:44,396 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-12 23:17:44,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-12 23:17:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:17:44,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:44,401 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:44,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:17:44,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:44,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1655368611, now seen corresponding path program 1 times [2021-11-12 23:17:44,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:17:44,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178074989] [2021-11-12 23:17:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:44,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:17:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:44,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:17:44,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178074989] [2021-11-12 23:17:44,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178074989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:44,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:44,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:17:44,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060505] [2021-11-12 23:17:44,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:44,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:17:44,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:17:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:17:44,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:17:44,537 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:44,613 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-11-12 23:17:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:17:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-12 23:17:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:44,614 INFO L225 Difference]: With dead ends: 31 [2021-11-12 23:17:44,614 INFO L226 Difference]: Without dead ends: 20 [2021-11-12 23:17:44,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:17:44,616 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.01ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:44,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 1.01ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 34.82ms Time] [2021-11-12 23:17:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-12 23:17:44,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-11-12 23:17:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-12 23:17:44,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-11-12 23:17:44,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:44,622 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-12 23:17:44,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-12 23:17:44,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-12 23:17:44,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:44,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:44,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:17:44,624 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash 233966664, now seen corresponding path program 1 times [2021-11-12 23:17:44,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:17:44,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369655979] [2021-11-12 23:17:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:44,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:17:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:44,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:17:44,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369655979] [2021-11-12 23:17:44,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369655979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:17:44,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135115153] [2021-11-12 23:17:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:44,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:44,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:44,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:17:44,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:17:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:44,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:17:44,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:45,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:45,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135115153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:45,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [602132892] [2021-11-12 23:17:45,118 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:17:45,118 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:17:45,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:17:45,127 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:17:45,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:17:45,164 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,168 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:45,169 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,170 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:17:45,173 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:45,174 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,174 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:17:45,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:17:45,198 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-11-12 23:17:45,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:45,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:17:45,227 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:45,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:45,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:45,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:45,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:45,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:45,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:45,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:17:45,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,315 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:45,317 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:45,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:45,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,350 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,355 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:45,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:17:45,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:17:45,381 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:17:45,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:45,390 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,398 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:45,399 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:45,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:17:45,415 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:17:45,423 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:17:45,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,475 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:17:45,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:17:45,499 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:17:45,507 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:45,510 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,520 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:17:45,521 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:17:45,528 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,536 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:45,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,618 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:17:45,640 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:45,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:17:45,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,757 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:17:45,763 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:45,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:45,818 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:45,825 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:45,841 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:45,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:45,852 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:17:46,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:17:46,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:17:46,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2021-11-12 23:17:46,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159772300] [2021-11-12 23:17:46,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:17:46,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:17:46,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:17:46,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:17:46,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:17:46,664 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:46,873 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-11-12 23:17:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:17:46,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-12 23:17:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:46,875 INFO L225 Difference]: With dead ends: 41 [2021-11-12 23:17:46,875 INFO L226 Difference]: Without dead ends: 30 [2021-11-12 23:17:46,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:17:46,877 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.40ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:46,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 41 Invalid, 121 Unknown, 0 Unchecked, 2.40ms Time], IncrementalHoareTripleChecker [27 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 94.05ms Time] [2021-11-12 23:17:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-12 23:17:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-11-12 23:17:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-12 23:17:46,882 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2021-11-12 23:17:46,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:46,883 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-12 23:17:46,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-12 23:17:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 23:17:46,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:46,885 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:46,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:47,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:47,099 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:47,100 INFO L85 PathProgramCache]: Analyzing trace with hash 885992160, now seen corresponding path program 2 times [2021-11-12 23:17:47,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:17:47,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280048428] [2021-11-12 23:17:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:47,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:17:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:47,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:17:47,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280048428] [2021-11-12 23:17:47,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280048428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:17:47,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718255841] [2021-11-12 23:17:47,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:17:47,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:47,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:47,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:17:47,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:17:47,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 23:17:47,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:17:47,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:17:47,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:47,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:47,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718255841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:47,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576233205] [2021-11-12 23:17:47,527 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:17:47,527 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:17:47,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:17:47,527 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:17:47,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:17:47,553 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,554 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:47,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,555 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:17:47,556 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:47,557 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:17:47,559 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:17:47,566 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 10=[|v_#valid_10|]} [2021-11-12 23:17:47,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:47,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:17:47,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:47,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:47,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:47,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:47,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:47,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:47,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:47,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:17:47,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:47,601 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:47,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:47,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,608 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,609 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:47,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:17:47,610 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:17:47,627 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:17:47,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:47,634 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,645 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:47,646 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,649 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:47,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:17:47,656 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:17:47,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:17:47,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,698 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:17:47,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:17:47,709 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:17:47,711 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:47,712 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:17:47,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:17:47,720 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:17:47,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,758 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:17:47,767 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:47,773 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:17:47,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,814 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:17:47,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:47,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:47,848 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:47,854 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:47,863 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:47,866 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:47,868 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:17:48,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:17:48,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:17:48,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2021-11-12 23:17:48,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732528768] [2021-11-12 23:17:48,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:17:48,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:17:48,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:17:48,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:17:48,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:17:48,645 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:48,921 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-11-12 23:17:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:17:48,922 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 23:17:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:48,924 INFO L225 Difference]: With dead ends: 54 [2021-11-12 23:17:48,924 INFO L226 Difference]: Without dead ends: 39 [2021-11-12 23:17:48,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 23:17:48,926 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.75ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 117.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:48,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 62 Invalid, 188 Unknown, 0 Unchecked, 2.75ms Time], IncrementalHoareTripleChecker [38 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 117.36ms Time] [2021-11-12 23:17:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-12 23:17:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-11-12 23:17:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-12 23:17:48,933 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2021-11-12 23:17:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:48,933 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-12 23:17:48,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-12 23:17:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 23:17:48,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:48,934 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:48,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:49,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:49,147 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:49,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1367196232, now seen corresponding path program 3 times [2021-11-12 23:17:49,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:17:49,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176150602] [2021-11-12 23:17:49,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:49,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:17:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:49,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:17:49,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176150602] [2021-11-12 23:17:49,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176150602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:17:49,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328877680] [2021-11-12 23:17:49,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:17:49,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:49,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:49,291 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:17:49,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:17:49,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:17:49,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:17:49,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:17:49,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:49,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:49,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328877680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:49,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [706023917] [2021-11-12 23:17:49,539 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:17:49,539 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:17:49,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:17:49,539 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:17:49,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:17:49,547 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,548 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:49,548 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:17:49,549 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:49,550 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,550 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:17:49,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:17:49,554 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 10=[|v_#valid_11|]} [2021-11-12 23:17:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:49,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:17:49,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:49,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:49,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:49,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:49,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:49,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:49,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:49,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:17:49,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:49,588 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:49,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:49,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,593 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,594 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:49,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:17:49,595 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:17:49,600 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:17:49,609 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:49,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,620 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:49,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:49,624 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:17:49,628 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:17:49,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:17:49,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,653 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:17:49,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:17:49,662 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:17:49,664 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:49,665 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:17:49,667 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:17:49,670 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:17:49,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,700 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:17:49,706 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:49,711 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:17:49,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,751 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:17:49,754 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:49,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:49,788 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:49,791 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:49,800 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:49,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:49,807 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:17:50,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:17:50,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:17:50,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2021-11-12 23:17:50,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098007372] [2021-11-12 23:17:50,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:17:50,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:17:50,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:17:50,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:17:50,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:17:50,556 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:50,862 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-11-12 23:17:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:17:50,866 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-12 23:17:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:50,867 INFO L225 Difference]: With dead ends: 69 [2021-11-12 23:17:50,867 INFO L226 Difference]: Without dead ends: 50 [2021-11-12 23:17:50,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2021-11-12 23:17:50,869 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.95ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:50,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 52 Invalid, 183 Unknown, 0 Unchecked, 1.95ms Time], IncrementalHoareTripleChecker [48 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 114.35ms Time] [2021-11-12 23:17:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-12 23:17:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2021-11-12 23:17:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-11-12 23:17:50,875 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-11-12 23:17:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:50,875 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-11-12 23:17:50,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-11-12 23:17:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-12 23:17:50,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:50,877 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:50,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:51,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:51,077 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:51,078 INFO L85 PathProgramCache]: Analyzing trace with hash -289016624, now seen corresponding path program 4 times [2021-11-12 23:17:51,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:17:51,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109405256] [2021-11-12 23:17:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:51,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:17:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 23 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:51,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:17:51,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109405256] [2021-11-12 23:17:51,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109405256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:17:51,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974583682] [2021-11-12 23:17:51,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:17:51,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:51,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:51,226 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:17:51,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:17:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:51,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:17:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:51,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:51,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974583682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:51,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1555962400] [2021-11-12 23:17:51,572 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:17:51,573 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:17:51,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:17:51,574 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:17:51,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:17:51,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,581 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:51,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:17:51,583 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:51,583 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,584 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:17:51,585 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:17:51,587 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 10=[|v_#valid_12|]} [2021-11-12 23:17:51,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:51,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:17:51,594 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,595 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:51,595 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,596 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:51,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:51,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:51,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:51,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:51,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:51,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:17:51,609 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,611 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:51,612 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:51,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:51,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,617 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:51,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:17:51,619 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:17:51,624 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:17:51,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:51,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,632 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:51,633 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,635 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:51,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:17:51,640 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:17:51,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:17:51,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,666 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:17:51,669 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:17:51,674 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:17:51,688 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:51,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,691 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:17:51,691 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:17:51,695 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:51,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,727 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:17:51,733 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:51,737 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:17:51,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,770 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:17:51,772 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:51,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:51,792 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:51,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:51,801 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:51,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:51,806 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:17:52,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:17:52,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:17:52,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2021-11-12 23:17:52,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418512635] [2021-11-12 23:17:52,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:17:52,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 23:17:52,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:17:52,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 23:17:52,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:17:52,444 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:52,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:52,619 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-11-12 23:17:52,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:17:52,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-12 23:17:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:52,621 INFO L225 Difference]: With dead ends: 75 [2021-11-12 23:17:52,622 INFO L226 Difference]: Without dead ends: 52 [2021-11-12 23:17:52,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 23:17:52,634 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.11ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:52,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 94 Invalid, 142 Unknown, 0 Unchecked, 2.11ms Time], IncrementalHoareTripleChecker [34 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 98.37ms Time] [2021-11-12 23:17:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-12 23:17:52,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-11-12 23:17:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-12 23:17:52,647 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2021-11-12 23:17:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:52,647 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-12 23:17:52,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-12 23:17:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 23:17:52,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:52,652 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:52,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:52,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-11-12 23:17:52,879 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:52,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:52,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1842565365, now seen corresponding path program 5 times [2021-11-12 23:17:52,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:17:52,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209923388] [2021-11-12 23:17:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:52,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:17:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:52,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:17:52,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209923388] [2021-11-12 23:17:52,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209923388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:17:52,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209432020] [2021-11-12 23:17:52,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:17:52,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:52,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:52,987 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:17:53,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:17:53,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-12 23:17:53,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:17:53,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:17:53,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:53,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:53,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209432020] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:53,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464106935] [2021-11-12 23:17:53,275 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:17:53,276 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:17:53,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:17:53,276 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:17:53,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:17:53,282 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,282 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:53,283 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,283 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:17:53,284 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:53,284 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,284 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:17:53,285 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:17:53,288 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 10=[|v_#valid_13|]} [2021-11-12 23:17:53,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:53,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:17:53,295 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:53,296 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,296 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:53,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:53,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:53,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:53,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:53,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:53,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:17:53,314 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,315 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:53,316 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,316 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:53,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:53,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,321 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:53,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:17:53,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:17:53,327 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:17:53,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:53,332 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,338 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:53,338 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,340 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:53,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:17:53,345 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:17:53,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:17:53,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,371 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:17:53,377 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:17:53,383 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:17:53,385 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:53,385 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:17:53,389 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:17:53,392 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,395 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:53,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:17:53,422 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:53,425 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:17:53,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,461 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:17:53,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:53,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:53,483 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:53,485 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:53,492 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:53,494 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:53,497 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:17:54,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:17:54,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:17:54,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2021-11-12 23:17:54,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966697614] [2021-11-12 23:17:54,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:17:54,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:17:54,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:17:54,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:17:54,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:17:54,099 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:54,243 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-11-12 23:17:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:17:54,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-12 23:17:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:54,245 INFO L225 Difference]: With dead ends: 54 [2021-11-12 23:17:54,245 INFO L226 Difference]: Without dead ends: 52 [2021-11-12 23:17:54,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:17:54,246 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:54,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 73 Invalid, 94 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [24 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 61.47ms Time] [2021-11-12 23:17:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-12 23:17:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-11-12 23:17:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-12 23:17:54,252 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 36 [2021-11-12 23:17:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:54,253 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-12 23:17:54,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-12 23:17:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 23:17:54,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:54,254 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:54,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:54,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-11-12 23:17:54,455 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:54,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:54,455 INFO L85 PathProgramCache]: Analyzing trace with hash -590488101, now seen corresponding path program 6 times [2021-11-12 23:17:54,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:17:54,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036138598] [2021-11-12 23:17:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:54,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:17:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 57 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:54,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:17:54,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036138598] [2021-11-12 23:17:54,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036138598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:17:54,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355184447] [2021-11-12 23:17:54,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:17:54,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:54,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:54,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:17:54,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:17:54,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:17:54,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:17:54,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:17:54,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:54,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:55,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355184447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:55,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422400400] [2021-11-12 23:17:55,091 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:17:55,091 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:17:55,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:17:55,092 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:17:55,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:17:55,100 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,101 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:55,101 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,102 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:17:55,102 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:55,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:17:55,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:17:55,107 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 10=[|v_#valid_14|]} [2021-11-12 23:17:55,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:55,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:17:55,113 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,113 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:55,114 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,115 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:55,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:55,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:55,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:55,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:55,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:55,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:17:55,131 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,133 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:55,134 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:55,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:55,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,138 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,139 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:55,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:17:55,140 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:17:55,149 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:17:55,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:55,155 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,161 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:55,162 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:55,165 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:17:55,168 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:17:55,171 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:17:55,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,230 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:17:55,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:17:55,238 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:17:55,239 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:55,240 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,241 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:17:55,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:17:55,245 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,248 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:17:55,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:17:55,275 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:55,278 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:17:55,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,308 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:17:55,310 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:55,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:55,328 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:55,330 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:55,337 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:55,340 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:55,342 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:17:55,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:17:55,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:17:55,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2021-11-12 23:17:55,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797109509] [2021-11-12 23:17:55,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:17:55,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-12 23:17:55,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:17:55,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-12 23:17:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 23:17:55,994 INFO L87 Difference]: Start difference. First operand 45 states and 47 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) [2021-11-12 23:17:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:56,277 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2021-11-12 23:17:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 23:17:56,278 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 44 [2021-11-12 23:17:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:56,278 INFO L225 Difference]: With dead ends: 124 [2021-11-12 23:17:56,278 INFO L226 Difference]: Without dead ends: 70 [2021-11-12 23:17:56,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=422, Invalid=1834, Unknown=0, NotChecked=0, Total=2256 [2021-11-12 23:17:56,281 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:56,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 146 Invalid, 228 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [57 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 134.89ms Time] [2021-11-12 23:17:56,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-12 23:17:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2021-11-12 23:17:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-11-12 23:17:56,288 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2021-11-12 23:17:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:56,288 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-11-12 23:17:56,288 INFO L471 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) [2021-11-12 23:17:56,289 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-11-12 23:17:56,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 23:17:56,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:56,290 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:56,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:56,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:56,507 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:56,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:56,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1203330149, now seen corresponding path program 7 times [2021-11-12 23:17:56,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:17:56,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462609955] [2021-11-12 23:17:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:56,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:17:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 42 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:56,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:17:56,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462609955] [2021-11-12 23:17:56,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462609955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:17:56,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525491895] [2021-11-12 23:17:56,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:17:56,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:56,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:56,630 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:17:56,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:17:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:56,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:17:56,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:56,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:56,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525491895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:56,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [465415346] [2021-11-12 23:17:56,921 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:17:56,921 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:17:56,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:17:56,921 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:17:56,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:17:56,926 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:56,927 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:56,935 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:56,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:17:56,936 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:56,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:56,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:17:56,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:17:56,940 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 10=[|v_#valid_15|]} [2021-11-12 23:17:56,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:56,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:17:56,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:56,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:56,947 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:56,948 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:56,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:56,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:56,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:56,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:56,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:56,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:56,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:56,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:17:56,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:56,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:56,962 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:56,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:56,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:56,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:56,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:56,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:56,967 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:56,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:17:56,968 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:17:56,972 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:17:56,975 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:56,978 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:56,981 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:56,982 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:56,984 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:56,985 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:17:56,995 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:17:56,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:17:57,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,026 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:17:57,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:17:57,033 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:17:57,037 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:57,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:57,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:17:57,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:17:57,043 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:57,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:57,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:57,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:17:57,078 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:57,081 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:17:57,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,118 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:17:57,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:57,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:57,139 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:57,142 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:57,148 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:57,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:57,155 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:17:57,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:17:57,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:17:57,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2021-11-12 23:17:57,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029726924] [2021-11-12 23:17:57,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:17:57,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:17:57,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:17:57,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:17:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:17:57,791 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 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) [2021-11-12 23:17:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:57,973 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-11-12 23:17:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 23:17:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 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 48 [2021-11-12 23:17:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:57,974 INFO L225 Difference]: With dead ends: 66 [2021-11-12 23:17:57,974 INFO L226 Difference]: Without dead ends: 64 [2021-11-12 23:17:57,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 23:17:57,976 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:57,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 93 Invalid, 124 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [30 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 66.06ms Time] [2021-11-12 23:17:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-12 23:17:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-11-12 23:17:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-11-12 23:17:57,982 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 48 [2021-11-12 23:17:57,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:57,988 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-11-12 23:17:57,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 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) [2021-11-12 23:17:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-11-12 23:17:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-12 23:17:57,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:57,990 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:58,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:58,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:58,195 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:58,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1063876939, now seen corresponding path program 8 times [2021-11-12 23:17:58,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:17:58,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287732833] [2021-11-12 23:17:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:58,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:17:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 107 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:58,373 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:17:58,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287732833] [2021-11-12 23:17:58,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287732833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:17:58,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403747372] [2021-11-12 23:17:58,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:17:58,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:17:58,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:58,379 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:17:58,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 23:17:58,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-12 23:17:58,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:17:58,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:17:58,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 128 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:58,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 128 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:59,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403747372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:59,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1960583568] [2021-11-12 23:17:59,040 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:17:59,040 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:17:59,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:17:59,041 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:17:59,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:17:59,050 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,050 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:59,051 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,052 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:17:59,052 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:59,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:17:59,066 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:17:59,068 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 10=[|v_#valid_16|]} [2021-11-12 23:17:59,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:59,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:17:59,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:59,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:59,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:59,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:59,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:59,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:59,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:59,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:17:59,112 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:59,114 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:17:59,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:17:59,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,128 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:59,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:17:59,129 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:17:59,132 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:17:59,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:17:59,139 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,141 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:59,142 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:17:59,145 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:17:59,150 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:17:59,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:17:59,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,199 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:17:59,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:17:59,207 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:17:59,208 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:17:59,211 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,213 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:17:59,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:17:59,217 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:59,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,238 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,241 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:17:59,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:17:59,247 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:17:59,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,278 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:17:59,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:17:59,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:17:59,304 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:59,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:59,314 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:17:59,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:17:59,322 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:17:59,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:17:59,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:17:59,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2021-11-12 23:17:59,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215444561] [2021-11-12 23:17:59,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:17:59,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 23:17:59,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:17:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 23:17:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 23:17:59,952 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:00,342 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2021-11-12 23:18:00,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-12 23:18:00,342 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-12 23:18:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:00,343 INFO L225 Difference]: With dead ends: 158 [2021-11-12 23:18:00,343 INFO L226 Difference]: Without dead ends: 88 [2021-11-12 23:18:00,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=640, Invalid=2666, Unknown=0, NotChecked=0, Total=3306 [2021-11-12 23:18:00,345 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.47ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 168.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:00,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 171 Invalid, 264 Unknown, 0 Unchecked, 2.47ms Time], IncrementalHoareTripleChecker [73 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 168.52ms Time] [2021-11-12 23:18:00,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-12 23:18:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2021-11-12 23:18:00,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-11-12 23:18:00,354 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2021-11-12 23:18:00,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:00,354 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-11-12 23:18:00,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:00,355 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-11-12 23:18:00,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:18:00,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:00,356 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:00,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:00,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-11-12 23:18:00,567 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:00,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:00,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1314293547, now seen corresponding path program 9 times [2021-11-12 23:18:00,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:00,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032361895] [2021-11-12 23:18:00,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:00,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 72 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:00,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:00,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032361895] [2021-11-12 23:18:00,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032361895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:00,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265843171] [2021-11-12 23:18:00,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:18:00,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:00,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:00,707 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:00,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 23:18:00,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:18:00,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:00,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:18:00,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:00,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:01,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265843171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:01,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2007750257] [2021-11-12 23:18:01,095 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:01,095 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:01,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:01,095 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:01,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:01,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,103 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:01,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:01,104 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:01,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:01,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:01,113 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 10=[|v_#valid_17|]} [2021-11-12 23:18:01,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:01,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:01,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:01,122 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,122 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:01,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:01,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:01,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:01,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:01,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:01,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:01,141 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:01,143 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:01,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:01,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:01,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:01,165 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:01,170 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:01,172 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:01,174 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,178 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:01,179 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,181 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:01,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:01,189 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:01,194 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:18:01,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,216 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:01,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:01,223 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:01,224 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:01,225 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:01,227 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:01,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:01,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:18:01,274 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:01,277 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:18:01,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,321 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:01,323 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:01,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:01,341 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:01,343 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:01,349 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:01,352 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:01,354 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:02,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:02,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:02,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 15 [2021-11-12 23:18:02,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919313478] [2021-11-12 23:18:02,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:02,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:18:02,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:02,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:18:02,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:18:02,016 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:02,226 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2021-11-12 23:18:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 23:18:02,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-12 23:18:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:02,227 INFO L225 Difference]: With dead ends: 78 [2021-11-12 23:18:02,227 INFO L226 Difference]: Without dead ends: 76 [2021-11-12 23:18:02,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 23:18:02,229 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.23ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:02,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 97 Invalid, 144 Unknown, 0 Unchecked, 1.23ms Time], IncrementalHoareTripleChecker [46 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 81.03ms Time] [2021-11-12 23:18:02,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-12 23:18:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2021-11-12 23:18:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-11-12 23:18:02,237 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 60 [2021-11-12 23:18:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:02,238 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-11-12 23:18:02,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-11-12 23:18:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:18:02,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:02,239 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:02,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:02,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-11-12 23:18:02,462 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:02,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:02,463 INFO L85 PathProgramCache]: Analyzing trace with hash 325985723, now seen corresponding path program 10 times [2021-11-12 23:18:02,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:02,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906545650] [2021-11-12 23:18:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:02,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 173 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:02,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:02,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906545650] [2021-11-12 23:18:02,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906545650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:02,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850642289] [2021-11-12 23:18:02,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:18:02,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:02,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:02,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:02,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 23:18:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:02,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 23:18:02,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 198 proven. 90 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:18:03,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 198 proven. 90 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:18:03,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850642289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:03,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104011927] [2021-11-12 23:18:03,397 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:03,397 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:03,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:03,397 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:03,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:03,407 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,407 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:03,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:03,408 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:03,414 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,415 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:03,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:03,418 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 10=[|v_#valid_18|]} [2021-11-12 23:18:03,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:03,424 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,424 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:03,425 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,425 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:03,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:03,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:03,439 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,440 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:03,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:03,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:03,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:03,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:03,448 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:03,452 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:03,454 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:03,457 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,459 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:03,460 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,461 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:03,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:03,465 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:03,468 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:18:03,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,487 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:03,490 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:03,495 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:03,496 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:03,496 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,498 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:03,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:03,501 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,506 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:18:03,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,527 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,530 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:18:03,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:03,536 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:18:03,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,562 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:03,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:03,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:03,583 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:03,585 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:03,591 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:03,593 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:03,596 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:04,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:04,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:04,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 35 [2021-11-12 23:18:04,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711390992] [2021-11-12 23:18:04,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:04,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-12 23:18:04,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:04,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-12 23:18:04,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2021-11-12 23:18:04,256 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:04,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:04,509 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2021-11-12 23:18:04,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 23:18:04,509 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 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 68 [2021-11-12 23:18:04,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:04,510 INFO L225 Difference]: With dead ends: 146 [2021-11-12 23:18:04,511 INFO L226 Difference]: Without dead ends: 101 [2021-11-12 23:18:04,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=549, Invalid=2313, Unknown=0, NotChecked=0, Total=2862 [2021-11-12 23:18:04,513 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:04,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 204 Invalid, 286 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [65 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 128.32ms Time] [2021-11-12 23:18:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-12 23:18:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2021-11-12 23:18:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-11-12 23:18:04,521 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2021-11-12 23:18:04,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:04,521 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-11-12 23:18:04,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:04,522 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-11-12 23:18:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:18:04,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:04,523 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:04,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:04,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-11-12 23:18:04,731 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:04,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:04,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1366833312, now seen corresponding path program 11 times [2021-11-12 23:18:04,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:04,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591040632] [2021-11-12 23:18:04,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:04,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 173 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:04,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:04,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591040632] [2021-11-12 23:18:04,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591040632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:04,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177445905] [2021-11-12 23:18:04,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:18:04,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:04,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:04,981 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:04,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 23:18:05,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-12 23:18:05,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:05,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 23:18:05,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 110 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:05,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 110 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:05,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177445905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:05,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1309794457] [2021-11-12 23:18:05,583 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:05,584 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:05,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:05,584 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:05,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:05,588 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,589 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:05,589 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,590 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:05,590 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:05,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:05,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:05,596 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 10=[|v_#valid_19|]} [2021-11-12 23:18:05,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:05,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:05,603 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:05,604 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:05,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:05,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:05,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:05,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:05,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:05,619 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:05,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:05,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:05,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,625 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:05,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:05,627 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:05,633 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:05,635 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:05,639 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,642 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:05,643 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,645 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:05,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:05,649 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:05,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:18:05,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,678 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:05,681 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:05,685 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:05,687 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:05,687 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:05,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:05,692 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,694 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:05,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,713 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:18:05,715 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:05,718 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:18:05,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,742 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:05,744 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:05,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:05,760 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:05,763 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:05,768 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:05,771 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:05,772 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:06,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:06,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:06,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 36 [2021-11-12 23:18:06,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242974477] [2021-11-12 23:18:06,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:06,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-12 23:18:06,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:06,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-12 23:18:06,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1701, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 23:18:06,461 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 36 states, 36 states have (on average 3.861111111111111) internal successors, (139), 36 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:07,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:07,371 INFO L93 Difference]: Finished difference Result 160 states and 175 transitions. [2021-11-12 23:18:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-12 23:18:07,372 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.861111111111111) internal successors, (139), 36 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-12 23:18:07,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:07,372 INFO L225 Difference]: With dead ends: 160 [2021-11-12 23:18:07,372 INFO L226 Difference]: Without dead ends: 113 [2021-11-12 23:18:07,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2466 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1184, Invalid=6648, Unknown=0, NotChecked=0, Total=7832 [2021-11-12 23:18:07,375 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 186 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 250.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.92ms SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 307.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:07,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 148 Invalid, 702 Unknown, 0 Unchecked, 3.92ms Time], IncrementalHoareTripleChecker [185 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 307.63ms Time] [2021-11-12 23:18:07,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-12 23:18:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-11-12 23:18:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-11-12 23:18:07,385 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 70 [2021-11-12 23:18:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:07,385 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-11-12 23:18:07,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.861111111111111) internal successors, (139), 36 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-11-12 23:18:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-12 23:18:07,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:07,387 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:07,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:07,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:07,591 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:07,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:07,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1928614536, now seen corresponding path program 12 times [2021-11-12 23:18:07,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:07,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906570557] [2021-11-12 23:18:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:07,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 212 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:07,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:07,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906570557] [2021-11-12 23:18:07,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906570557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:07,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742410572] [2021-11-12 23:18:07,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:18:07,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:07,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:07,858 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:07,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-12 23:18:07,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:18:07,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:07,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 23:18:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 132 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:08,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 132 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:08,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742410572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:08,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344378080] [2021-11-12 23:18:08,475 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:08,475 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:08,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:08,476 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:08,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:08,481 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,482 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:08,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:08,483 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:08,483 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:08,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:08,489 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_19|], 10=[|v_#valid_20|]} [2021-11-12 23:18:08,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:08,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:08,494 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,494 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:08,495 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,495 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:08,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:08,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:08,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:08,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:08,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:08,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:08,506 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,507 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:08,507 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,508 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:08,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:08,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,510 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:08,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:08,511 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:08,518 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:08,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:08,521 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,523 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:08,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,524 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:08,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:08,527 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:08,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:18:08,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,564 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:08,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:08,571 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:08,574 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:08,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:08,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:08,579 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:08,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,612 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:18:08,618 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:08,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:18:08,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,650 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:08,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:08,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:08,670 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:08,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:08,678 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:08,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:08,685 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:09,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:09,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:09,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 39 [2021-11-12 23:18:09,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235361763] [2021-11-12 23:18:09,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:09,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-12 23:18:09,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:09,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-12 23:18:09,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1937, Unknown=0, NotChecked=0, Total=2256 [2021-11-12 23:18:09,493 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 39 states, 39 states have (on average 3.871794871794872) internal successors, (151), 39 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:10,508 INFO L93 Difference]: Finished difference Result 173 states and 189 transitions. [2021-11-12 23:18:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-12 23:18:10,509 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.871794871794872) internal successors, (151), 39 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 76 [2021-11-12 23:18:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:10,510 INFO L225 Difference]: With dead ends: 173 [2021-11-12 23:18:10,510 INFO L226 Difference]: Without dead ends: 122 [2021-11-12 23:18:10,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2902 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1378, Invalid=7742, Unknown=0, NotChecked=0, Total=9120 [2021-11-12 23:18:10,514 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 170 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 283.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.17ms SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 350.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:10,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 177 Invalid, 763 Unknown, 0 Unchecked, 4.17ms Time], IncrementalHoareTripleChecker [171 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 350.65ms Time] [2021-11-12 23:18:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-12 23:18:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2021-11-12 23:18:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 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) [2021-11-12 23:18:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2021-11-12 23:18:10,523 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 76 [2021-11-12 23:18:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:10,523 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2021-11-12 23:18:10,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.871794871794872) internal successors, (151), 39 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2021-11-12 23:18:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 23:18:10,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:10,525 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:10,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:10,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-11-12 23:18:10,751 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:10,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1246411120, now seen corresponding path program 13 times [2021-11-12 23:18:10,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:10,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956739447] [2021-11-12 23:18:10,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:10,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 255 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:11,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:11,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956739447] [2021-11-12 23:18:11,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956739447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:11,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046635900] [2021-11-12 23:18:11,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:18:11,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:11,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:11,102 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:11,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-12 23:18:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:11,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 23:18:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 288 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:11,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 288 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:11,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046635900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:11,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111470202] [2021-11-12 23:18:11,939 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:11,939 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:11,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:11,940 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:11,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:11,943 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:11,944 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:11,944 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:11,944 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:11,945 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:11,945 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:11,945 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:11,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:11,947 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_20|], 10=[|v_#valid_21|]} [2021-11-12 23:18:11,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:11,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:11,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:11,957 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:11,957 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:11,957 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:11,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:11,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:11,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:11,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:11,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:11,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:11,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:11,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:11,971 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:11,972 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:11,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:11,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:11,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:11,974 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:11,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:11,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:11,975 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:11,978 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:12,004 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:12,007 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:12,009 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:12,010 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:12,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:12,012 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:12,015 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:12,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:18:12,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,039 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:12,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:12,046 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:12,048 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:12,048 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:12,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:12,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:12,053 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:12,055 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:12,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:12,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:18:12,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:12,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:18:12,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,103 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:12,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:12,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:12,120 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:12,122 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:12,128 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:12,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:12,131 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:12,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:12,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:12,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2021-11-12 23:18:12,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502719415] [2021-11-12 23:18:12,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:12,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-12 23:18:12,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:12,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-12 23:18:12,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2175, Unknown=0, NotChecked=0, Total=2652 [2021-11-12 23:18:12,924 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 43 states, 43 states have (on average 3.2093023255813953) internal successors, (138), 43 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:13,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:13,239 INFO L93 Difference]: Finished difference Result 179 states and 195 transitions. [2021-11-12 23:18:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-12 23:18:13,239 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2093023255813953) internal successors, (138), 43 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-12 23:18:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:13,240 INFO L225 Difference]: With dead ends: 179 [2021-11-12 23:18:13,240 INFO L226 Difference]: Without dead ends: 124 [2021-11-12 23:18:13,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=843, Invalid=3317, Unknown=0, NotChecked=0, Total=4160 [2021-11-12 23:18:13,243 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 90 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:13,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 251 Invalid, 341 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [69 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 147.92ms Time] [2021-11-12 23:18:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-12 23:18:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2021-11-12 23:18:13,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-11-12 23:18:13,251 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2021-11-12 23:18:13,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:13,251 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-11-12 23:18:13,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2093023255813953) internal successors, (138), 43 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-11-12 23:18:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 23:18:13,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:13,253 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:13,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-12 23:18:13,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-11-12 23:18:13,475 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1761469621, now seen corresponding path program 14 times [2021-11-12 23:18:13,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:13,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880522352] [2021-11-12 23:18:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:13,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 156 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:13,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:13,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880522352] [2021-11-12 23:18:13,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880522352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:13,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186866796] [2021-11-12 23:18:13,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:18:13,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:13,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:13,660 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:13,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 23:18:13,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-12 23:18:13,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:13,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-12 23:18:13,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 182 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:13,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 182 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:14,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186866796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:14,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [832800850] [2021-11-12 23:18:14,145 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:14,145 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:14,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:14,145 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:14,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:14,164 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,165 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:14,165 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:14,166 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:14,166 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:14,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:14,169 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_21|], 10=[|v_#valid_22|]} [2021-11-12 23:18:14,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:14,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:14,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:14,176 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:14,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:14,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:14,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:14,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:14,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:14,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:14,188 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:14,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:14,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:14,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,193 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,194 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:14,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:14,195 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:14,200 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:14,201 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:14,204 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,206 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:14,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,208 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:14,209 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:14,212 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:14,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:18:14,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,231 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:14,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:14,238 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:14,239 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:14,240 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,241 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:14,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:14,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,246 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:14,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,265 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:18:14,267 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:14,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:18:14,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,295 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:14,297 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:14,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:14,312 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:14,314 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:14,320 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:14,322 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:14,337 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:14,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:14,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:14,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 19 [2021-11-12 23:18:14,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606350908] [2021-11-12 23:18:14,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:14,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 23:18:14,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:14,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 23:18:14,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:18:14,896 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:15,179 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2021-11-12 23:18:15,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-12 23:18:15,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-12 23:18:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:15,180 INFO L225 Difference]: With dead ends: 102 [2021-11-12 23:18:15,180 INFO L226 Difference]: Without dead ends: 100 [2021-11-12 23:18:15,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=500, Invalid=1480, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 23:18:15,181 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 110 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:15,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 123 Invalid, 211 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [75 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 122.88ms Time] [2021-11-12 23:18:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-12 23:18:15,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-11-12 23:18:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:15,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2021-11-12 23:18:15,187 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 84 [2021-11-12 23:18:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:15,188 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2021-11-12 23:18:15,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:15,188 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2021-11-12 23:18:15,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 23:18:15,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:15,189 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:15,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:15,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-11-12 23:18:15,403 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1928810085, now seen corresponding path program 15 times [2021-11-12 23:18:15,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:15,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411021629] [2021-11-12 23:18:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:15,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 353 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:15,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:15,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411021629] [2021-11-12 23:18:15,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411021629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:15,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149682974] [2021-11-12 23:18:15,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:18:15,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:15,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:15,826 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:15,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 23:18:15,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:18:15,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:15,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-12 23:18:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 392 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:16,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 392 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:16,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149682974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:16,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571351370] [2021-11-12 23:18:16,779 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:16,779 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:16,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:16,780 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:16,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:16,788 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,789 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:16,789 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,789 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:16,790 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:16,790 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:16,791 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:16,793 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_22|], 10=[|v_#valid_23|]} [2021-11-12 23:18:16,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:16,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:16,799 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:16,800 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:16,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:16,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:16,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:16,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:16,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:16,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:16,812 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:16,813 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:16,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:16,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,828 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:16,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:16,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:16,835 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:16,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:16,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,842 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:16,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:16,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:16,847 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:16,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:18:16,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,866 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:16,868 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:16,872 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:16,873 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:16,874 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:16,876 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:16,878 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:16,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,918 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:18:16,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:16,926 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:18:16,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,956 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:16,958 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:16,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:16,974 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:16,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:16,982 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:16,984 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:16,986 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:17,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:17,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:17,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2021-11-12 23:18:17,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128665553] [2021-11-12 23:18:17,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:17,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-12 23:18:17,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-12 23:18:17,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=2784, Unknown=0, NotChecked=0, Total=3422 [2021-11-12 23:18:17,704 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 50 states, 50 states have (on average 3.3) internal successors, (165), 50 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:18,369 INFO L93 Difference]: Finished difference Result 260 states and 279 transitions. [2021-11-12 23:18:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-12 23:18:18,370 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.3) internal successors, (165), 50 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-12 23:18:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:18,371 INFO L225 Difference]: With dead ends: 260 [2021-11-12 23:18:18,371 INFO L226 Difference]: Without dead ends: 142 [2021-11-12 23:18:18,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1582, Invalid=6074, Unknown=0, NotChecked=0, Total=7656 [2021-11-12 23:18:18,375 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 163 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.61ms SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:18,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 348 Invalid, 479 Unknown, 0 Unchecked, 2.61ms Time], IncrementalHoareTripleChecker [104 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 228.07ms Time] [2021-11-12 23:18:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-12 23:18:18,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 97. [2021-11-12 23:18:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2021-11-12 23:18:18,385 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2021-11-12 23:18:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:18,385 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2021-11-12 23:18:18,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.3) internal successors, (165), 50 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2021-11-12 23:18:18,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:18:18,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:18,387 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:18,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:18,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-11-12 23:18:18,603 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:18,604 INFO L85 PathProgramCache]: Analyzing trace with hash -806538203, now seen corresponding path program 16 times [2021-11-12 23:18:18,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:18,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081844752] [2021-11-12 23:18:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:18,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 210 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:18,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:18,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081844752] [2021-11-12 23:18:18,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081844752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:18,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174616886] [2021-11-12 23:18:18,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:18:18,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:18,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:18,873 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:18,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-12 23:18:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:18,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-12 23:18:18,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 240 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:19,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 240 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:19,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174616886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:19,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [799513596] [2021-11-12 23:18:19,353 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:19,353 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:19,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:19,354 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:19,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:19,358 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,359 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:19,359 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,360 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:19,361 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:19,362 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,362 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:19,363 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:19,365 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_23|], 10=[|v_#valid_24|]} [2021-11-12 23:18:19,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:19,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:19,371 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,372 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:19,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,372 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:19,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:19,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:19,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:19,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:19,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:19,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:19,384 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:19,385 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,386 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:19,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:19,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:19,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:19,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:19,395 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:19,397 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:19,399 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,401 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:19,402 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:19,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:19,407 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:19,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:18:19,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,425 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:19,427 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:19,433 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:19,434 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:19,435 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:19,437 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:19,440 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:19,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,458 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:18:19,462 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:19,465 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:18:19,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,489 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:19,491 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:19,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:19,507 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:19,509 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:19,515 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:19,517 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:19,518 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:20,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:20,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:20,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 21 [2021-11-12 23:18:20,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221675205] [2021-11-12 23:18:20,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:20,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 23:18:20,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:20,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 23:18:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=704, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:18:20,266 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 22 states, 22 states have (on average 5.318181818181818) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:20,596 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2021-11-12 23:18:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-12 23:18:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.318181818181818) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-12 23:18:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:20,597 INFO L225 Difference]: With dead ends: 114 [2021-11-12 23:18:20,598 INFO L226 Difference]: Without dead ends: 112 [2021-11-12 23:18:20,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1743, Unknown=0, NotChecked=0, Total=2352 [2021-11-12 23:18:20,599 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 112 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:20,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 134 Invalid, 223 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [70 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 118.58ms Time] [2021-11-12 23:18:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-12 23:18:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2021-11-12 23:18:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2021-11-12 23:18:20,607 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 96 [2021-11-12 23:18:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:20,607 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2021-11-12 23:18:20,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.318181818181818) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2021-11-12 23:18:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 23:18:20,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:20,609 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:20,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:20,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:20,809 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:20,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:20,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1859546869, now seen corresponding path program 17 times [2021-11-12 23:18:20,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:20,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353464768] [2021-11-12 23:18:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:20,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 467 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:21,313 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:21,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353464768] [2021-11-12 23:18:21,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353464768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:21,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190039881] [2021-11-12 23:18:21,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:18:21,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:21,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:21,314 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:21,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 23:18:21,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-12 23:18:21,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:21,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-12 23:18:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 512 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:22,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 512 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:22,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190039881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:22,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [551804826] [2021-11-12 23:18:22,580 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:22,580 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:22,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:22,580 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:22,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:22,584 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,585 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:22,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,586 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:22,587 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:22,588 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:22,589 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:22,591 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_24|], 10=[|v_#valid_25|]} [2021-11-12 23:18:22,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:22,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:22,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:22,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:22,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:22,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:22,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:22,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:22,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:22,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:22,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:22,612 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:22,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:22,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:22,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:22,618 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:22,622 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:22,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:22,625 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,626 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:22,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:22,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:22,630 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:22,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:18:22,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,646 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:22,649 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:22,651 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:22,652 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:22,653 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:22,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:22,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:22,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,671 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:18:22,677 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:22,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:18:22,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,706 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:22,708 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:22,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:22,722 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:22,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:22,730 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:22,733 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:22,734 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:23,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:23,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:23,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 56 [2021-11-12 23:18:23,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007100733] [2021-11-12 23:18:23,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:23,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-12 23:18:23,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:23,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-12 23:18:23,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=3374, Unknown=0, NotChecked=0, Total=4160 [2021-11-12 23:18:23,546 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 56 states, 56 states have (on average 3.3035714285714284) internal successors, (185), 56 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:24,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:24,300 INFO L93 Difference]: Finished difference Result 294 states and 315 transitions. [2021-11-12 23:18:24,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-12 23:18:24,301 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.3035714285714284) internal successors, (185), 56 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-12 23:18:24,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:24,302 INFO L225 Difference]: With dead ends: 294 [2021-11-12 23:18:24,302 INFO L226 Difference]: Without dead ends: 160 [2021-11-12 23:18:24,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2614 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1992, Invalid=7514, Unknown=0, NotChecked=0, Total=9506 [2021-11-12 23:18:24,303 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 194 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.94ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 252.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:24,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 437 Invalid, 567 Unknown, 0 Unchecked, 1.94ms Time], IncrementalHoareTripleChecker [102 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 252.64ms Time] [2021-11-12 23:18:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-12 23:18:24,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 109. [2021-11-12 23:18:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:24,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2021-11-12 23:18:24,315 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2021-11-12 23:18:24,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:24,315 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2021-11-12 23:18:24,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.3035714285714284) internal successors, (185), 56 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:24,316 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2021-11-12 23:18:24,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:18:24,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:24,317 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:24,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:24,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:24,535 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1174629227, now seen corresponding path program 18 times [2021-11-12 23:18:24,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:24,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640244667] [2021-11-12 23:18:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:24,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 272 proven. 546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:24,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:24,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640244667] [2021-11-12 23:18:24,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640244667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:24,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365798100] [2021-11-12 23:18:24,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:18:24,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:24,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:24,819 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:24,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-12 23:18:24,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:18:24,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:24,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-12 23:18:24,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 306 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:25,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 306 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:25,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365798100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:25,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501712147] [2021-11-12 23:18:25,483 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:25,483 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:25,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:25,483 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:25,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:25,486 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,487 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:25,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:25,488 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:25,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:25,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:25,492 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_25|], 10=[|v_#valid_26|]} [2021-11-12 23:18:25,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:25,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:25,498 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,498 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:25,498 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:25,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:25,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:25,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:25,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:25,511 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,512 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:25,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,512 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:25,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:25,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,515 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:25,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:25,516 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:25,519 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:25,521 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:25,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,526 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:25,527 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,528 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:25,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:25,532 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:25,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:18:25,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,551 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:25,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:25,558 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:25,560 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:25,560 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:25,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:25,565 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:25,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,583 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,586 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:18:25,588 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:25,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:18:25,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,631 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:25,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:25,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:25,646 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:25,648 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:25,654 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:25,656 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:25,657 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:26,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:26,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:26,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 23 [2021-11-12 23:18:26,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587191900] [2021-11-12 23:18:26,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:26,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 23:18:26,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:26,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 23:18:26,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 23:18:26,239 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 24 states, 24 states have (on average 5.375) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:26,527 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2021-11-12 23:18:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-12 23:18:26,527 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-12 23:18:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:26,529 INFO L225 Difference]: With dead ends: 126 [2021-11-12 23:18:26,529 INFO L226 Difference]: Without dead ends: 124 [2021-11-12 23:18:26,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=730, Invalid=2026, Unknown=0, NotChecked=0, Total=2756 [2021-11-12 23:18:26,530 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:26,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 159 Invalid, 242 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [60 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 98.99ms Time] [2021-11-12 23:18:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-12 23:18:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2021-11-12 23:18:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2021-11-12 23:18:26,537 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 108 [2021-11-12 23:18:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:26,538 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2021-11-12 23:18:26,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:26,538 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2021-11-12 23:18:26,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:18:26,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:26,539 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:26,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:26,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:26,767 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:26,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:26,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2083946117, now seen corresponding path program 19 times [2021-11-12 23:18:26,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:26,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278470115] [2021-11-12 23:18:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:26,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 597 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:27,331 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:27,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278470115] [2021-11-12 23:18:27,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278470115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:27,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527149499] [2021-11-12 23:18:27,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:18:27,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:27,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:27,332 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:27,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-12 23:18:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:27,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-12 23:18:27,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 646 proven. 306 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:18:28,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 646 proven. 306 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:18:28,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527149499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:28,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250066764] [2021-11-12 23:18:28,517 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:28,517 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:28,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:28,517 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:28,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:28,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,524 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:28,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,524 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:28,525 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:28,525 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:28,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:28,541 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_26|], 10=[|v_#valid_27|]} [2021-11-12 23:18:28,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:28,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:28,548 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:28,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:28,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:28,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:28,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:28,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:28,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:28,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:28,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:28,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:28,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:28,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,566 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:28,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:28,568 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:28,571 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:28,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:28,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,578 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:28,578 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:28,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:28,582 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:28,584 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:18:28,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,606 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:28,609 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:28,613 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:28,614 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:28,614 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:28,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:28,619 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:28,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,636 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,638 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:18:28,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:28,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:18:28,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,672 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:28,673 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:28,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:28,693 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:28,695 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:28,701 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:28,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:28,704 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:29,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:29,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:29,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 59 [2021-11-12 23:18:29,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222747177] [2021-11-12 23:18:29,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:29,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-12 23:18:29,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:29,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-12 23:18:29,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=847, Invalid=3709, Unknown=0, NotChecked=0, Total=4556 [2021-11-12 23:18:29,468 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:30,071 INFO L93 Difference]: Finished difference Result 250 states and 271 transitions. [2021-11-12 23:18:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-12 23:18:30,072 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 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 [2021-11-12 23:18:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:30,077 INFO L225 Difference]: With dead ends: 250 [2021-11-12 23:18:30,078 INFO L226 Difference]: Without dead ends: 173 [2021-11-12 23:18:30,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1533, Invalid=5777, Unknown=0, NotChecked=0, Total=7310 [2021-11-12 23:18:30,079 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 163 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 235.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.24ms SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 282.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:30,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 412 Invalid, 600 Unknown, 0 Unchecked, 2.24ms Time], IncrementalHoareTripleChecker [153 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 282.92ms Time] [2021-11-12 23:18:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-12 23:18:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 119. [2021-11-12 23:18:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:30,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-11-12 23:18:30,090 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2021-11-12 23:18:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:30,090 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-11-12 23:18:30,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-11-12 23:18:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 23:18:30,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:30,091 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:30,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:30,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-11-12 23:18:30,299 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:30,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:30,300 INFO L85 PathProgramCache]: Analyzing trace with hash 146691680, now seen corresponding path program 20 times [2021-11-12 23:18:30,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:30,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918924977] [2021-11-12 23:18:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:30,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 597 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:30,911 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:30,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918924977] [2021-11-12 23:18:30,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918924977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:30,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748778648] [2021-11-12 23:18:30,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:18:30,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:30,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:30,915 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:30,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-12 23:18:31,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-12 23:18:31,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:31,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-12 23:18:31,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 648 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:31,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 648 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:32,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748778648] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:32,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033292828] [2021-11-12 23:18:32,202 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:32,202 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:32,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:32,202 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:32,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:32,206 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,207 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:32,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:32,207 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:32,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,208 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:32,209 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:32,210 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_27|], 10=[|v_#valid_28|]} [2021-11-12 23:18:32,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:32,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:32,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:32,219 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:32,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:32,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:32,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:32,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:32,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:32,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:32,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:32,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:32,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:32,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,233 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:32,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:32,234 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:32,237 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:32,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:32,240 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,242 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:32,243 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:32,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:32,246 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:32,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:18:32,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,288 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:32,290 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:32,296 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:32,297 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:32,298 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:32,300 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:32,302 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,304 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:32,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,320 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,322 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:18:32,325 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:32,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:18:32,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,355 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:32,356 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:32,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:32,392 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:32,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:32,400 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:32,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:32,405 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:33,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:33,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:33,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 61 [2021-11-12 23:18:33,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924326352] [2021-11-12 23:18:33,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:33,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-12 23:18:33,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-12 23:18:33,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=3921, Unknown=0, NotChecked=0, Total=4830 [2021-11-12 23:18:33,176 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 61 states, 61 states have (on average 3.2459016393442623) internal successors, (198), 61 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:33,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:33,680 INFO L93 Difference]: Finished difference Result 257 states and 279 transitions. [2021-11-12 23:18:33,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-12 23:18:33,681 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.2459016393442623) internal successors, (198), 61 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 118 [2021-11-12 23:18:33,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:33,682 INFO L225 Difference]: With dead ends: 257 [2021-11-12 23:18:33,682 INFO L226 Difference]: Without dead ends: 178 [2021-11-12 23:18:33,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1671, Invalid=6161, Unknown=0, NotChecked=0, Total=7832 [2021-11-12 23:18:33,684 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 140 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 219.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:33,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 384 Invalid, 501 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [104 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 219.72ms Time] [2021-11-12 23:18:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-12 23:18:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 121. [2021-11-12 23:18:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2021-11-12 23:18:33,695 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 118 [2021-11-12 23:18:33,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:33,696 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2021-11-12 23:18:33,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.2459016393442623) internal successors, (198), 61 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2021-11-12 23:18:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 23:18:33,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:33,697 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:33,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:33,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-11-12 23:18:33,911 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:33,911 INFO L85 PathProgramCache]: Analyzing trace with hash 600933893, now seen corresponding path program 21 times [2021-11-12 23:18:33,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:33,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695159515] [2021-11-12 23:18:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:33,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 342 proven. 686 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:34,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:34,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695159515] [2021-11-12 23:18:34,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695159515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:34,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113551611] [2021-11-12 23:18:34,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:18:34,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:34,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:34,230 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:34,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-12 23:18:34,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:18:34,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:34,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-12 23:18:34,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 380 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:34,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 380 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:34,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113551611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:34,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [160103877] [2021-11-12 23:18:34,944 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:34,944 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:34,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:34,944 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:34,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:34,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:34,948 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:34,949 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:34,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:34,949 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:34,950 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:34,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:34,951 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:34,954 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_28|], 10=[|v_#valid_29|]} [2021-11-12 23:18:34,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:34,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:34,961 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:34,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:34,962 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:34,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:34,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:34,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:34,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:34,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:34,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:34,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:34,973 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:34,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:34,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:34,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:34,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:34,976 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:34,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:34,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:34,977 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:34,980 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:34,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:34,982 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:34,989 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:34,989 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:34,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:34,991 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:34,993 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:34,996 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:18:34,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,013 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:35,015 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:35,019 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:35,021 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:35,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:35,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:35,023 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:35,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:35,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:35,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,044 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:35,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:18:35,049 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:35,052 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:18:35,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,073 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:35,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:35,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:35,089 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:35,091 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:35,097 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:35,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:35,100 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:35,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:35,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:35,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 25 [2021-11-12 23:18:35,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068690834] [2021-11-12 23:18:35,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:35,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-12 23:18:35,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:35,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-12 23:18:35,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 23:18:35,703 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 25 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:36,044 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2021-11-12 23:18:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-12 23:18:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 25 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-12 23:18:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:36,046 INFO L225 Difference]: With dead ends: 138 [2021-11-12 23:18:36,046 INFO L226 Difference]: Without dead ends: 136 [2021-11-12 23:18:36,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 364 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=2329, Unknown=0, NotChecked=0, Total=3192 [2021-11-12 23:18:36,047 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 96 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.84ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:36,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 194 Invalid, 277 Unknown, 0 Unchecked, 0.84ms Time], IncrementalHoareTripleChecker [66 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 127.74ms Time] [2021-11-12 23:18:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-12 23:18:36,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2021-11-12 23:18:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2021-11-12 23:18:36,057 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 120 [2021-11-12 23:18:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:36,057 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2021-11-12 23:18:36,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 25 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:36,058 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2021-11-12 23:18:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 23:18:36,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:36,058 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:36,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:36,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-11-12 23:18:36,259 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:36,259 INFO L85 PathProgramCache]: Analyzing trace with hash 604898027, now seen corresponding path program 22 times [2021-11-12 23:18:36,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:36,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745445098] [2021-11-12 23:18:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:36,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 743 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:36,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:36,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745445098] [2021-11-12 23:18:36,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745445098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:36,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037050419] [2021-11-12 23:18:36,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:18:36,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:36,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:36,932 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:36,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-12 23:18:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:37,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-12 23:18:37,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 798 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:18:38,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 798 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:18:38,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037050419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:38,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1018471377] [2021-11-12 23:18:38,287 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:38,287 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:38,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:38,288 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:38,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:38,316 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,317 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:38,317 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:38,318 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:38,318 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:38,319 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:38,322 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_29|], 10=[|v_#valid_30|]} [2021-11-12 23:18:38,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:38,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:38,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,328 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:38,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:38,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:38,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:38,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:38,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:38,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:38,339 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:38,341 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:38,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:38,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,345 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:38,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:38,346 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:38,351 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:38,352 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:38,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,357 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:38,358 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:38,360 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:38,362 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:38,364 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:18:38,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,380 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:38,383 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:38,389 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:38,391 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:38,391 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,393 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:38,393 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:38,395 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,397 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:18:38,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,410 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:18:38,411 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:38,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:18:38,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,429 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:38,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:38,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:38,439 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:38,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:38,445 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:38,446 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:38,447 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:39,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:39,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:39,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 65 [2021-11-12 23:18:39,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90540300] [2021-11-12 23:18:39,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:39,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-12 23:18:39,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:39,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-12 23:18:39,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1017, Invalid=4385, Unknown=0, NotChecked=0, Total=5402 [2021-11-12 23:18:39,247 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 65 states, 65 states have (on average 3.3230769230769233) internal successors, (216), 65 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:39,810 INFO L93 Difference]: Finished difference Result 276 states and 299 transitions. [2021-11-12 23:18:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-12 23:18:39,811 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3230769230769233) internal successors, (216), 65 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-12 23:18:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:39,812 INFO L225 Difference]: With dead ends: 276 [2021-11-12 23:18:39,812 INFO L226 Difference]: Without dead ends: 191 [2021-11-12 23:18:39,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1859, Invalid=6883, Unknown=0, NotChecked=0, Total=8742 [2021-11-12 23:18:39,814 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 188 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:39,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 369 Invalid, 597 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [193 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 228.90ms Time] [2021-11-12 23:18:39,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-12 23:18:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 131. [2021-11-12 23:18:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2021-11-12 23:18:39,826 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2021-11-12 23:18:39,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:39,826 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2021-11-12 23:18:39,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3230769230769233) internal successors, (216), 65 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:39,827 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2021-11-12 23:18:39,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 23:18:39,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:39,828 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:39,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:40,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:40,043 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:40,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:40,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1214666672, now seen corresponding path program 23 times [2021-11-12 23:18:40,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:40,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666036303] [2021-11-12 23:18:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:40,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 743 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:40,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:40,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666036303] [2021-11-12 23:18:40,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666036303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:40,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872052163] [2021-11-12 23:18:40,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:18:40,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:40,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:40,642 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:40,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-12 23:18:40,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-12 23:18:40,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:40,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-12 23:18:40,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 800 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:41,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 800 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:42,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872052163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:42,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [979318437] [2021-11-12 23:18:42,079 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:42,079 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:42,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:42,079 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:42,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:42,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,097 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:42,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:42,098 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:42,098 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:42,100 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:42,102 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_30|], 10=[|v_#valid_31|]} [2021-11-12 23:18:42,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:42,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:42,109 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,109 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:42,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:42,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:42,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:42,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:42,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:42,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:42,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:42,121 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,122 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:42,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,123 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:42,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:42,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,127 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:42,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:42,127 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:42,130 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:42,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:42,133 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,134 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:42,134 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,136 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:42,136 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:42,138 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:42,144 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:18:42,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,155 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:42,157 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:42,160 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:42,160 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:42,161 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:42,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:42,164 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,165 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:42,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:18:42,188 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:42,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:18:42,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,213 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:42,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:42,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:42,229 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:42,231 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:42,237 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:42,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:42,240 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:43,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:43,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:43,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 67 [2021-11-12 23:18:43,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023923802] [2021-11-12 23:18:43,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:43,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-12 23:18:43,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:43,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-12 23:18:43,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=4615, Unknown=0, NotChecked=0, Total=5700 [2021-11-12 23:18:43,022 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 67 states, 67 states have (on average 3.253731343283582) internal successors, (218), 67 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:43,615 INFO L93 Difference]: Finished difference Result 283 states and 307 transitions. [2021-11-12 23:18:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-12 23:18:43,615 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.253731343283582) internal successors, (218), 67 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-12 23:18:43,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:43,617 INFO L225 Difference]: With dead ends: 283 [2021-11-12 23:18:43,617 INFO L226 Difference]: Without dead ends: 196 [2021-11-12 23:18:43,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2011, Invalid=7301, Unknown=0, NotChecked=0, Total=9312 [2021-11-12 23:18:43,619 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 178 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 205.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 256.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:43,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 442 Invalid, 635 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [170 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 256.01ms Time] [2021-11-12 23:18:43,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-12 23:18:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 133. [2021-11-12 23:18:43,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2021-11-12 23:18:43,631 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 130 [2021-11-12 23:18:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:43,631 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2021-11-12 23:18:43,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.253731343283582) internal successors, (218), 67 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2021-11-12 23:18:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 23:18:43,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:43,633 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:43,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:43,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-11-12 23:18:43,847 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:43,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1764652939, now seen corresponding path program 24 times [2021-11-12 23:18:43,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:43,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756753502] [2021-11-12 23:18:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:43,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 420 proven. 842 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:44,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:44,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756753502] [2021-11-12 23:18:44,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756753502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:44,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025923501] [2021-11-12 23:18:44,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:18:44,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:44,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:44,212 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:44,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-12 23:18:44,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:18:44,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:44,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-12 23:18:44,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 462 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:44,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 462 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:44,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025923501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:44,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1444721998] [2021-11-12 23:18:44,834 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:44,834 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:44,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:44,834 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:44,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:44,837 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,838 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:44,838 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,838 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:44,838 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:44,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,839 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:44,839 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:44,841 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_31|], 10=[|v_#valid_32|]} [2021-11-12 23:18:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:44,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:44,846 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,846 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:44,848 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,848 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:44,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:44,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:44,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:44,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:44,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:44,865 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,866 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:44,867 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:44,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:44,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:44,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:44,870 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:44,875 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:44,876 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:44,878 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,879 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:44,879 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:44,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:44,883 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:44,886 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:18:44,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,897 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:44,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:44,902 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:44,902 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:44,903 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:44,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:44,906 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,907 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:44,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,917 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:18:44,934 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:44,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:18:44,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,951 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:44,952 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:44,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:44,962 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:44,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:44,967 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:44,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:44,970 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:45,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:45,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:45,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 27 [2021-11-12 23:18:45,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019382958] [2021-11-12 23:18:45,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:45,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-12 23:18:45,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:45,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-12 23:18:45,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 23:18:45,560 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 28 states, 28 states have (on average 5.464285714285714) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:45,951 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2021-11-12 23:18:45,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-12 23:18:45,951 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.464285714285714) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-12 23:18:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:45,952 INFO L225 Difference]: With dead ends: 150 [2021-11-12 23:18:45,952 INFO L226 Difference]: Without dead ends: 148 [2021-11-12 23:18:45,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 402 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1008, Invalid=2652, Unknown=0, NotChecked=0, Total=3660 [2021-11-12 23:18:45,953 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 171 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.19ms SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:45,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 191 Invalid, 325 Unknown, 0 Unchecked, 1.19ms Time], IncrementalHoareTripleChecker [115 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 142.14ms Time] [2021-11-12 23:18:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-12 23:18:45,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2021-11-12 23:18:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2021-11-12 23:18:45,966 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 132 [2021-11-12 23:18:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:45,967 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2021-11-12 23:18:45,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.464285714285714) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2021-11-12 23:18:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 23:18:45,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:45,968 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:45,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-12 23:18:46,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-11-12 23:18:46,192 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:46,192 INFO L85 PathProgramCache]: Analyzing trace with hash -35875493, now seen corresponding path program 25 times [2021-11-12 23:18:46,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:46,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890753381] [2021-11-12 23:18:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:46,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 905 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:46,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:46,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890753381] [2021-11-12 23:18:46,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890753381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:46,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316281289] [2021-11-12 23:18:46,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:18:46,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:46,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:46,920 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:46,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-12 23:18:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:47,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-12 23:18:47,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 966 proven. 462 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:18:48,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 966 proven. 462 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:18:48,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316281289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:48,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [765181018] [2021-11-12 23:18:48,352 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:48,352 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:48,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:48,352 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:48,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:48,354 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,355 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:48,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,355 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:48,356 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:48,356 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,357 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:48,357 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:48,358 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_32|], 10=[|v_#valid_33|]} [2021-11-12 23:18:48,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:48,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:48,363 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,363 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:48,364 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,364 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:48,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:48,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:48,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:48,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:48,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:48,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,373 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:48,374 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:48,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:48,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,376 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,377 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:48,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:48,377 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:48,380 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:48,381 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:48,383 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,385 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:48,385 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,393 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:48,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:48,395 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:48,398 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:18:48,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,409 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:48,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:48,414 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:48,415 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:48,415 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:48,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:48,418 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:48,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,430 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:18:48,433 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:48,435 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:18:48,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,466 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:48,468 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:48,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:48,477 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:48,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:48,482 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:48,484 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:48,485 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:49,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:49,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:49,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 71 [2021-11-12 23:18:49,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326955421] [2021-11-12 23:18:49,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:49,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-12 23:18:49,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-12 23:18:49,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=5117, Unknown=0, NotChecked=0, Total=6320 [2021-11-12 23:18:49,291 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 71 states, 71 states have (on average 3.323943661971831) internal successors, (236), 71 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:49,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:49,880 INFO L93 Difference]: Finished difference Result 302 states and 327 transitions. [2021-11-12 23:18:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-12 23:18:49,880 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.323943661971831) internal successors, (236), 71 states have internal predecessors, (236), 0 states have call successors, (0), 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 [2021-11-12 23:18:49,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:49,881 INFO L225 Difference]: With dead ends: 302 [2021-11-12 23:18:49,881 INFO L226 Difference]: Without dead ends: 209 [2021-11-12 23:18:49,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2217, Invalid=8085, Unknown=0, NotChecked=0, Total=10302 [2021-11-12 23:18:49,882 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 178 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 184.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 225.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:49,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 414 Invalid, 589 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [149 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 225.32ms Time] [2021-11-12 23:18:49,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-12 23:18:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 143. [2021-11-12 23:18:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-11-12 23:18:49,896 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2021-11-12 23:18:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:49,896 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-11-12 23:18:49,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.323943661971831) internal successors, (236), 71 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-11-12 23:18:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:18:49,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:49,897 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:49,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:50,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-11-12 23:18:50,103 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:50,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:50,103 INFO L85 PathProgramCache]: Analyzing trace with hash 634014528, now seen corresponding path program 26 times [2021-11-12 23:18:50,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:50,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964874193] [2021-11-12 23:18:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:50,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 905 proven. 569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:50,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:50,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964874193] [2021-11-12 23:18:50,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964874193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:50,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636429544] [2021-11-12 23:18:50,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:18:50,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:50,869 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:50,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 23:18:50,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-12 23:18:50,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:50,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-12 23:18:50,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 968 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:52,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 968 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:52,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636429544] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:52,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1000562385] [2021-11-12 23:18:52,470 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:52,470 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:52,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:52,470 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:52,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:52,473 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,474 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:52,474 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,475 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:52,475 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:52,475 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,475 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:52,476 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:52,478 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_33|], 10=[|v_#valid_34|]} [2021-11-12 23:18:52,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:52,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:52,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,484 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:52,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,485 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:52,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:52,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:52,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:52,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:52,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:52,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:52,497 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,498 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:52,498 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:52,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:52,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,513 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:52,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:52,513 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:52,518 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:52,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:52,522 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,524 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:52,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:52,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:52,529 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:52,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:18:52,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,546 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:52,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:52,552 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:52,553 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:52,554 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,555 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:52,556 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:52,558 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:18:52,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:18:52,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:52,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:18:52,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,603 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:52,605 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:52,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:52,618 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:52,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:52,625 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:52,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:52,629 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:53,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:53,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:53,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 73 [2021-11-12 23:18:53,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626890299] [2021-11-12 23:18:53,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:53,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-12 23:18:53,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:53,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-12 23:18:53,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=5365, Unknown=0, NotChecked=0, Total=6642 [2021-11-12 23:18:53,448 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 73 states, 73 states have (on average 3.26027397260274) internal successors, (238), 73 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:54,130 INFO L93 Difference]: Finished difference Result 309 states and 335 transitions. [2021-11-12 23:18:54,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-12 23:18:54,130 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.26027397260274) internal successors, (238), 73 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-12 23:18:54,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:54,132 INFO L225 Difference]: With dead ends: 309 [2021-11-12 23:18:54,132 INFO L226 Difference]: Without dead ends: 214 [2021-11-12 23:18:54,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2835 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2383, Invalid=8537, Unknown=0, NotChecked=0, Total=10920 [2021-11-12 23:18:54,134 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 210 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.10ms SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 274.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:54,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 471 Invalid, 695 Unknown, 0 Unchecked, 2.10ms Time], IncrementalHoareTripleChecker [193 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 274.59ms Time] [2021-11-12 23:18:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-12 23:18:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 145. [2021-11-12 23:18:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2021-11-12 23:18:54,148 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 142 [2021-11-12 23:18:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:54,148 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2021-11-12 23:18:54,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.26027397260274) internal successors, (238), 73 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2021-11-12 23:18:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 23:18:54,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:54,150 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:54,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:54,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-11-12 23:18:54,363 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:54,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:54,364 INFO L85 PathProgramCache]: Analyzing trace with hash 153230309, now seen corresponding path program 27 times [2021-11-12 23:18:54,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:54,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392363412] [2021-11-12 23:18:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:54,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 506 proven. 1014 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:54,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:54,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392363412] [2021-11-12 23:18:54,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392363412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:54,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966634534] [2021-11-12 23:18:54,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:18:54,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:54,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:54,769 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:54,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-12 23:18:54,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:18:54,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:54,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-12 23:18:54,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 552 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:55,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 552 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:55,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966634534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:55,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [93671045] [2021-11-12 23:18:55,521 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:55,521 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:55,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:55,521 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:55,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:55,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,524 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:55,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,524 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:55,524 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:55,525 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:55,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:55,527 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_34|], 10=[|v_#valid_35|]} [2021-11-12 23:18:55,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:55,532 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:55,532 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:55,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:55,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:55,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:55,545 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:55,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:55,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,547 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:55,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:55,548 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:55,551 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:55,552 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:55,554 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,555 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:55,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,556 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:55,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:55,559 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:55,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:18:55,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,571 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:55,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:55,578 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:55,579 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:55,579 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:55,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:55,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:18:55,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,606 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:18:55,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:55,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:18:55,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,634 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:55,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:55,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:55,650 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:55,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:55,658 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:55,660 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:55,662 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:18:56,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:18:56,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:56,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 29 [2021-11-12 23:18:56,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467000283] [2021-11-12 23:18:56,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:56,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-12 23:18:56,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:18:56,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-12 23:18:56,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1076, Unknown=0, NotChecked=0, Total=1482 [2021-11-12 23:18:56,261 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 30 states, 30 states have (on average 5.5) internal successors, (165), 29 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:56,684 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2021-11-12 23:18:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-12 23:18:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.5) internal successors, (165), 29 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-12 23:18:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:56,685 INFO L225 Difference]: With dead ends: 162 [2021-11-12 23:18:56,686 INFO L226 Difference]: Without dead ends: 160 [2021-11-12 23:18:56,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1165, Invalid=2995, Unknown=0, NotChecked=0, Total=4160 [2021-11-12 23:18:56,687 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 132 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.15ms SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:56,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 224 Invalid, 354 Unknown, 0 Unchecked, 1.15ms Time], IncrementalHoareTripleChecker [101 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 140.92ms Time] [2021-11-12 23:18:56,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-12 23:18:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 153. [2021-11-12 23:18:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2021-11-12 23:18:56,701 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 144 [2021-11-12 23:18:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:56,701 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2021-11-12 23:18:56,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.5) internal successors, (165), 29 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:56,702 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2021-11-12 23:18:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-12 23:18:56,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:56,703 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:56,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:56,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:56,919 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:56,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1239070923, now seen corresponding path program 28 times [2021-11-12 23:18:56,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:56,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319950237] [2021-11-12 23:18:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:56,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1083 proven. 621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:57,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:18:57,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319950237] [2021-11-12 23:18:57,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319950237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:57,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243836196] [2021-11-12 23:18:57,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:18:57,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:57,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:57,814 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:57,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-12 23:18:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:57,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-12 23:18:57,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1150 proven. 552 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:18:59,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1150 proven. 552 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:18:59,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243836196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:59,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930077057] [2021-11-12 23:18:59,497 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:18:59,498 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:18:59,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:18:59,498 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:18:59,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:18:59,501 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,502 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:59,502 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:18:59,503 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:59,503 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,503 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:18:59,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:18:59,506 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_35|], 10=[|v_#valid_36|]} [2021-11-12 23:18:59,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:59,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:18:59,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,512 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:59,513 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,513 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:59,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:59,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:59,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:59,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:59,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:18:59,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:59,526 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:18:59,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:18:59,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,530 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:59,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:18:59,531 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:18:59,535 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:18:59,537 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:18:59,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,541 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:59,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:18:59,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:18:59,546 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:18:59,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:18:59,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,565 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:18:59,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:18:59,572 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:18:59,573 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:18:59,573 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,574 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:18:59,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:18:59,577 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:18:59,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:18:59,601 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:18:59,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:18:59,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,618 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:18:59,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:18:59,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:18:59,628 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:59,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:59,634 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:18:59,635 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:18:59,636 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:19:00,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:19:00,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:00,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 77 [2021-11-12 23:19:00,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371257130] [2021-11-12 23:19:00,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:19:00,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-12 23:19:00,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:19:00,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-12 23:19:00,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=5905, Unknown=0, NotChecked=0, Total=7310 [2021-11-12 23:19:00,488 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 77 states, 77 states have (on average 3.324675324675325) internal successors, (256), 77 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:01,235 INFO L93 Difference]: Finished difference Result 328 states and 355 transitions. [2021-11-12 23:19:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-12 23:19:01,235 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.324675324675325) internal successors, (256), 77 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-12 23:19:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:01,236 INFO L225 Difference]: With dead ends: 328 [2021-11-12 23:19:01,237 INFO L226 Difference]: Without dead ends: 227 [2021-11-12 23:19:01,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3123 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2607, Invalid=9383, Unknown=0, NotChecked=0, Total=11990 [2021-11-12 23:19:01,239 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 209 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 258.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.27ms SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 313.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:01,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 575 Invalid, 799 Unknown, 0 Unchecked, 2.27ms Time], IncrementalHoareTripleChecker [195 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 313.11ms Time] [2021-11-12 23:19:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-12 23:19:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 155. [2021-11-12 23:19:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2021-11-12 23:19:01,262 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2021-11-12 23:19:01,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:01,262 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2021-11-12 23:19:01,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.324675324675325) internal successors, (256), 77 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:01,262 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2021-11-12 23:19:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 23:19:01,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:01,263 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:01,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:01,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:01,467 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:01,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash -183124176, now seen corresponding path program 29 times [2021-11-12 23:19:01,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:19:01,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013093341] [2021-11-12 23:19:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:01,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:19:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 1083 proven. 669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:02,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:19:02,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013093341] [2021-11-12 23:19:02,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013093341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:02,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82189517] [2021-11-12 23:19:02,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:19:02,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:02,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:02,316 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:19:02,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-12 23:19:02,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-11-12 23:19:02,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:19:02,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-12 23:19:02,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 1152 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:03,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 1152 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:04,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82189517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:19:04,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1626228280] [2021-11-12 23:19:04,022 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:19:04,022 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:19:04,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:19:04,022 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:19:04,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:19:04,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,025 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:04,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:19:04,026 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:04,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:19:04,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:19:04,029 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_36|], 10=[|v_#valid_37|]} [2021-11-12 23:19:04,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:04,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:19:04,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:04,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:04,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:04,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:04,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:04,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:04,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:19:04,058 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,059 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:04,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:04,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:04,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:04,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:19:04,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:19:04,069 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:19:04,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:04,073 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,076 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:04,076 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:04,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:19:04,082 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:19:04,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:19:04,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,102 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:19:04,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:19:04,108 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:19:04,110 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:04,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:19:04,112 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:19:04,114 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,116 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:04,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,132 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:19:04,137 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:04,139 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:19:04,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,155 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:19:04,157 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:04,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:04,169 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:04,172 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:04,176 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:04,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:04,179 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:19:05,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:19:05,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:05,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 79 [2021-11-12 23:19:05,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029555203] [2021-11-12 23:19:05,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:19:05,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-12 23:19:05,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:19:05,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-12 23:19:05,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=6171, Unknown=0, NotChecked=0, Total=7656 [2021-11-12 23:19:05,023 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 79 states, 79 states have (on average 3.2658227848101267) internal successors, (258), 79 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:06,002 INFO L93 Difference]: Finished difference Result 335 states and 363 transitions. [2021-11-12 23:19:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-12 23:19:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.2658227848101267) internal successors, (258), 79 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-12 23:19:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:06,004 INFO L225 Difference]: With dead ends: 335 [2021-11-12 23:19:06,004 INFO L226 Difference]: Without dead ends: 232 [2021-11-12 23:19:06,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3256 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2787, Invalid=9869, Unknown=0, NotChecked=0, Total=12656 [2021-11-12 23:19:06,006 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 204 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 290.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.93ms SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 360.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:06,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 576 Invalid, 806 Unknown, 0 Unchecked, 2.93ms Time], IncrementalHoareTripleChecker [197 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 360.32ms Time] [2021-11-12 23:19:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-12 23:19:06,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 157. [2021-11-12 23:19:06,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:06,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2021-11-12 23:19:06,023 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 154 [2021-11-12 23:19:06,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:06,023 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2021-11-12 23:19:06,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.2658227848101267) internal successors, (258), 79 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2021-11-12 23:19:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:19:06,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:06,024 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:06,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:06,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:06,225 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:06,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:06,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1113014187, now seen corresponding path program 30 times [2021-11-12 23:19:06,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:19:06,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321511121] [2021-11-12 23:19:06,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:06,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:19:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 600 proven. 1202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:06,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:19:06,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321511121] [2021-11-12 23:19:06,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321511121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:06,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097029237] [2021-11-12 23:19:06,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:19:06,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:06,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:06,683 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:19:06,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-12 23:19:06,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:19:06,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:19:06,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-12 23:19:06,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 650 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:07,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 650 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:07,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097029237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:19:07,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527608274] [2021-11-12 23:19:07,417 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:19:07,417 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:19:07,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:19:07,417 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:19:07,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:19:07,429 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,430 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:07,430 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:19:07,430 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:07,450 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,450 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:19:07,451 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:19:07,452 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_37|], 10=[|v_#valid_38|]} [2021-11-12 23:19:07,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:07,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:19:07,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,459 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:07,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,459 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:07,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:07,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:07,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:07,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:07,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:07,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:19:07,467 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,468 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:07,469 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,469 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:07,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:07,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,471 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:07,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:19:07,472 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:19:07,475 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:19:07,476 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:07,478 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,479 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:07,479 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,480 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:07,481 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:19:07,483 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:19:07,485 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:19:07,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,497 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:19:07,498 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:19:07,501 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:19:07,503 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:07,503 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:19:07,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:19:07,508 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,509 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:07,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:19:07,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:07,539 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:19:07,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,559 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:19:07,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:07,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:07,575 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:07,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:07,582 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:07,584 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:07,586 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:19:08,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:19:08,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:08,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 31 [2021-11-12 23:19:08,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518568475] [2021-11-12 23:19:08,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:19:08,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 23:19:08,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:19:08,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 23:19:08,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 23:19:08,275 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 32 states, 32 states have (on average 5.53125) internal successors, (177), 31 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:08,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:08,723 INFO L93 Difference]: Finished difference Result 174 states and 177 transitions. [2021-11-12 23:19:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-12 23:19:08,724 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.53125) internal successors, (177), 31 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-12 23:19:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:08,725 INFO L225 Difference]: With dead ends: 174 [2021-11-12 23:19:08,725 INFO L226 Difference]: Without dead ends: 172 [2021-11-12 23:19:08,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 478 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1334, Invalid=3358, Unknown=0, NotChecked=0, Total=4692 [2021-11-12 23:19:08,726 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 204 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:08,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 216 Invalid, 388 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [135 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 146.01ms Time] [2021-11-12 23:19:08,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-12 23:19:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2021-11-12 23:19:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2021-11-12 23:19:08,743 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 156 [2021-11-12 23:19:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:08,743 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2021-11-12 23:19:08,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.53125) internal successors, (177), 31 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2021-11-12 23:19:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-12 23:19:08,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:08,745 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:08,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:08,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-11-12 23:19:08,963 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash -848433861, now seen corresponding path program 31 times [2021-11-12 23:19:08,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:19:08,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310062110] [2021-11-12 23:19:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:08,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:19:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1277 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:09,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:19:09,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310062110] [2021-11-12 23:19:09,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310062110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:09,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060522664] [2021-11-12 23:19:09,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:19:09,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:09,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:09,844 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:19:09,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-12 23:19:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:09,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-12 23:19:09,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1350 proven. 650 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:19:11,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1350 proven. 650 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:19:11,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060522664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:19:11,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [469099910] [2021-11-12 23:19:11,691 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:19:11,691 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:19:11,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:19:11,691 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:19:11,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:19:11,703 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,703 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:11,703 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:19:11,704 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:11,704 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:19:11,705 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:19:11,706 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_38|], 10=[|v_#valid_39|]} [2021-11-12 23:19:11,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:11,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:19:11,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,711 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:11,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,712 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:11,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:11,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:11,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:11,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:19:11,727 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:11,728 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,729 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:11,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:11,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,731 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:11,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:19:11,731 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:19:11,734 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:19:11,737 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:11,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,740 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:11,741 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:11,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:19:11,744 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:19:11,746 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:19:11,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,764 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:19:11,770 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:19:11,773 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:19:11,773 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:11,774 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:19:11,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:19:11,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:19:11,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,800 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:19:11,804 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:11,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:19:11,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,826 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:19:11,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:11,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:11,839 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:11,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:11,856 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:11,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:11,860 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:19:12,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:19:12,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:12,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 83 [2021-11-12 23:19:12,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613335390] [2021-11-12 23:19:12,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:19:12,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-12 23:19:12,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:19:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-12 23:19:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=6749, Unknown=0, NotChecked=0, Total=8372 [2021-11-12 23:19:12,744 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 83 states, 83 states have (on average 3.325301204819277) internal successors, (276), 83 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:13,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:13,593 INFO L93 Difference]: Finished difference Result 354 states and 383 transitions. [2021-11-12 23:19:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-12 23:19:13,593 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.325301204819277) internal successors, (276), 83 states have internal predecessors, (276), 0 states have call successors, (0), 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 164 [2021-11-12 23:19:13,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:13,595 INFO L225 Difference]: With dead ends: 354 [2021-11-12 23:19:13,595 INFO L226 Difference]: Without dead ends: 245 [2021-11-12 23:19:13,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3029, Invalid=10777, Unknown=0, NotChecked=0, Total=13806 [2021-11-12 23:19:13,596 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 226 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 275.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.37ms SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 346.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:13,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 600 Invalid, 818 Unknown, 0 Unchecked, 2.37ms Time], IncrementalHoareTripleChecker [183 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 346.17ms Time] [2021-11-12 23:19:13,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-12 23:19:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 167. [2021-11-12 23:19:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2021-11-12 23:19:13,607 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2021-11-12 23:19:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:13,607 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2021-11-12 23:19:13,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.325301204819277) internal successors, (276), 83 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2021-11-12 23:19:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-12 23:19:13,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:13,608 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:13,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:13,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable813 [2021-11-12 23:19:13,808 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:13,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1543404512, now seen corresponding path program 32 times [2021-11-12 23:19:13,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:19:13,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619668852] [2021-11-12 23:19:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:13,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:19:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1277 proven. 777 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:14,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:19:14,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619668852] [2021-11-12 23:19:14,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619668852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:14,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42514419] [2021-11-12 23:19:14,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:19:14,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:14,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:14,717 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:19:14,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-12 23:19:14,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-11-12 23:19:14,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:19:14,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-12 23:19:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 702 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:15,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 702 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:16,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42514419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:19:16,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2099465567] [2021-11-12 23:19:16,240 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:19:16,240 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:19:16,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:19:16,241 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:19:16,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:19:16,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,244 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:16,245 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:19:16,246 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:16,246 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,246 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:19:16,247 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:19:16,249 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_39|], 10=[|v_#valid_40|]} [2021-11-12 23:19:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:16,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:19:16,255 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:16,256 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:16,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:16,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:16,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:16,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:16,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:16,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:19:16,268 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,269 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:16,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:16,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:16,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,273 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,274 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:16,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:19:16,274 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:19:16,279 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:19:16,280 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:16,283 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,285 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:16,286 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:16,288 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:19:16,290 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:19:16,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:19:16,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,308 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:19:16,310 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:19:16,314 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:19:16,315 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:16,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:19:16,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:19:16,320 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:19:16,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,337 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,339 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:19:16,342 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:16,344 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:19:16,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,364 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:19:16,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:16,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:16,380 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:16,382 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:16,386 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:16,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:16,389 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:19:17,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:19:17,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:17,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 29, 29] total 84 [2021-11-12 23:19:17,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555101354] [2021-11-12 23:19:17,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:19:17,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-12 23:19:17,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:19:17,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-12 23:19:17,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=7277, Unknown=0, NotChecked=0, Total=8556 [2021-11-12 23:19:17,265 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 84 states, 84 states have (on average 3.9404761904761907) internal successors, (331), 84 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:19,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:19,885 INFO L93 Difference]: Finished difference Result 368 states and 399 transitions. [2021-11-12 23:19:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-12 23:19:19,885 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.9404761904761907) internal successors, (331), 84 states have internal predecessors, (331), 0 states have call successors, (0), 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 166 [2021-11-12 23:19:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:19,886 INFO L225 Difference]: With dead ends: 368 [2021-11-12 23:19:19,886 INFO L226 Difference]: Without dead ends: 257 [2021-11-12 23:19:19,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 487 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13642 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6088, Invalid=34112, Unknown=0, NotChecked=0, Total=40200 [2021-11-12 23:19:19,889 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 418 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 611.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.08ms SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 740.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:19,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 465 Invalid, 2247 Unknown, 0 Unchecked, 5.08ms Time], IncrementalHoareTripleChecker [477 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 740.60ms Time] [2021-11-12 23:19:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-12 23:19:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 173. [2021-11-12 23:19:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:19,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2021-11-12 23:19:19,906 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 166 [2021-11-12 23:19:19,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:19,907 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2021-11-12 23:19:19,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.9404761904761907) internal successors, (331), 84 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2021-11-12 23:19:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-12 23:19:19,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:19,908 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:19,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:20,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-11-12 23:19:20,132 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:20,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:20,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1621508872, now seen corresponding path program 33 times [2021-11-12 23:19:20,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:19:20,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072840631] [2021-11-12 23:19:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:20,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:19:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1380 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:21,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:19:21,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072840631] [2021-11-12 23:19:21,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072840631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:21,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844729711] [2021-11-12 23:19:21,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:19:21,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:21,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:21,328 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:19:21,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-12 23:19:21,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:19:21,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:19:21,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-12 23:19:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 756 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:22,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 756 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:22,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844729711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:19:22,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1023429958] [2021-11-12 23:19:22,948 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:19:22,949 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:19:22,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:19:22,949 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:19:22,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:19:22,958 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:22,959 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:22,965 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:22,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:19:22,966 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:22,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:22,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:19:22,967 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:19:22,968 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_40|], 10=[|v_#valid_41|]} [2021-11-12 23:19:22,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:22,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:19:22,973 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:22,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:22,973 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:22,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:22,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:22,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:22,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:22,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:22,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:22,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:22,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:22,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:19:22,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:22,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:22,986 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:22,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:22,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:22,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:22,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:22,988 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:22,989 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:22,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:19:22,989 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:19:22,992 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:19:22,993 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:22,995 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:22,996 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:22,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:22,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:22,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:19:23,000 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:19:23,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:19:23,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,039 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:19:23,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:19:23,045 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:19:23,046 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:23,047 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:23,048 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:19:23,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:19:23,051 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:23,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:19:23,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,069 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:23,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:19:23,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:23,077 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:19:23,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,099 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:19:23,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:23,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:23,115 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:23,118 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:23,125 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:23,127 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:23,129 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:19:24,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:19:24,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:24,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 30, 30] total 87 [2021-11-12 23:19:24,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738664690] [2021-11-12 23:19:24,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:19:24,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-12 23:19:24,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:19:24,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-12 23:19:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1367, Invalid=7753, Unknown=0, NotChecked=0, Total=9120 [2021-11-12 23:19:24,141 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 87 states, 87 states have (on average 3.942528735632184) internal successors, (343), 87 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:26,901 INFO L93 Difference]: Finished difference Result 381 states and 413 transitions. [2021-11-12 23:19:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-11-12 23:19:26,902 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.942528735632184) internal successors, (343), 87 states have internal predecessors, (343), 0 states have call successors, (0), 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 [2021-11-12 23:19:26,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:26,903 INFO L225 Difference]: With dead ends: 381 [2021-11-12 23:19:26,903 INFO L226 Difference]: Without dead ends: 266 [2021-11-12 23:19:26,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 505 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14638 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6522, Invalid=36534, Unknown=0, NotChecked=0, Total=43056 [2021-11-12 23:19:26,907 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 552 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 642.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.48ms SdHoareTripleChecker+Time, 621 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 774.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:26,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 396 Invalid, 2351 Unknown, 0 Unchecked, 5.48ms Time], IncrementalHoareTripleChecker [621 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 774.49ms Time] [2021-11-12 23:19:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-12 23:19:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 179. [2021-11-12 23:19:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0168539325842696) internal successors, (181), 178 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2021-11-12 23:19:26,924 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 172 [2021-11-12 23:19:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:26,924 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2021-11-12 23:19:26,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.942528735632184) internal successors, (343), 87 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2021-11-12 23:19:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-12 23:19:26,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:26,926 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:26,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:27,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:27,139 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:27,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1842551312, now seen corresponding path program 34 times [2021-11-12 23:19:27,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:19:27,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219542524] [2021-11-12 23:19:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:27,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:19:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1487 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:28,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:19:28,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219542524] [2021-11-12 23:19:28,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219542524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:28,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125343685] [2021-11-12 23:19:28,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:19:28,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:28,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:28,309 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:19:28,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-12 23:19:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:28,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-12 23:19:28,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1568 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:30,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1568 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:30,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125343685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:19:30,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1827562237] [2021-11-12 23:19:30,607 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:19:30,608 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:19:30,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:19:30,608 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:19:30,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:19:30,632 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,633 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:30,633 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:19:30,634 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:30,634 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,634 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:19:30,635 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:19:30,637 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_41|], 10=[|v_#valid_42|]} [2021-11-12 23:19:30,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:30,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:19:30,643 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,643 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:30,643 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:30,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:30,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:30,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:30,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:30,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:30,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:19:30,654 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,656 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:30,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,656 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:30,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:30,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,659 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,660 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:30,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:19:30,661 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:19:30,665 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:19:30,667 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:30,669 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,671 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:30,672 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,673 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:30,674 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:19:30,676 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:19:30,679 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:19:30,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,694 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:19:30,696 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:19:30,701 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:19:30,702 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:30,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:19:30,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:19:30,707 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:19:30,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,727 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:19:30,730 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:30,733 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:19:30,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,754 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:19:30,756 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:30,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:30,768 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:30,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:30,773 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:30,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:30,776 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:19:31,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:19:31,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:31,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 91 [2021-11-12 23:19:31,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757946896] [2021-11-12 23:19:31,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:19:31,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-12 23:19:31,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:19:31,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-12 23:19:31,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1949, Invalid=7951, Unknown=0, NotChecked=0, Total=9900 [2021-11-12 23:19:31,691 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 91 states, 91 states have (on average 3.2747252747252746) internal successors, (298), 91 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:32,680 INFO L93 Difference]: Finished difference Result 387 states and 419 transitions. [2021-11-12 23:19:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-12 23:19:32,680 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.2747252747252746) internal successors, (298), 91 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-12 23:19:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:32,681 INFO L225 Difference]: With dead ends: 387 [2021-11-12 23:19:32,681 INFO L226 Difference]: Without dead ends: 268 [2021-11-12 23:19:32,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4182 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3691, Invalid=12821, Unknown=0, NotChecked=0, Total=16512 [2021-11-12 23:19:32,682 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 327 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 300.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.91ms SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 374.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:32,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 691 Invalid, 997 Unknown, 0 Unchecked, 2.91ms Time], IncrementalHoareTripleChecker [273 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 374.31ms Time] [2021-11-12 23:19:32,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-12 23:19:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 181. [2021-11-12 23:19:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0166666666666666) internal successors, (183), 180 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2021-11-12 23:19:32,700 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 178 [2021-11-12 23:19:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:32,700 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2021-11-12 23:19:32,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.2747252747252746) internal successors, (298), 91 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2021-11-12 23:19:32,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-12 23:19:32,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:32,701 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:32,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:32,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-11-12 23:19:32,901 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:32,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:32,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1196540875, now seen corresponding path program 35 times [2021-11-12 23:19:32,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:19:32,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592309991] [2021-11-12 23:19:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:32,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:19:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2438 backedges. 812 proven. 1626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:33,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:19:33,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592309991] [2021-11-12 23:19:33,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592309991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:33,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783008996] [2021-11-12 23:19:33,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:19:33,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:33,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:33,460 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:19:33,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-12 23:19:33,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-12 23:19:33,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:19:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-12 23:19:33,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2438 backedges. 870 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:34,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2438 backedges. 870 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:34,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783008996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:19:34,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840011332] [2021-11-12 23:19:34,343 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:19:34,343 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:19:34,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:19:34,343 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:19:34,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:19:34,345 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,345 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:34,346 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:19:34,346 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:34,346 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:19:34,347 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:19:34,348 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_42|], 10=[|v_#valid_43|]} [2021-11-12 23:19:34,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:34,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:19:34,353 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,353 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:34,353 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,354 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:34,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:34,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:34,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:34,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:34,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:34,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:19:34,366 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,367 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:34,368 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:34,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:34,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,370 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:34,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:19:34,371 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:19:34,374 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:19:34,375 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:34,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,391 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:34,392 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:34,395 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:19:34,397 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:19:34,400 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:19:34,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,415 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:19:34,418 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:19:34,422 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:19:34,446 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:34,447 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:19:34,449 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:19:34,451 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,453 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:19:34,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,470 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:19:34,473 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:34,476 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:19:34,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,497 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:19:34,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:34,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:34,508 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:34,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:34,517 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:34,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:34,520 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:19:35,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:19:35,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:35,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 35 [2021-11-12 23:19:35,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891337406] [2021-11-12 23:19:35,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:19:35,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-12 23:19:35,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:19:35,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-12 23:19:35,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=1397, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 23:19:35,155 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand has 36 states, 36 states have (on average 5.583333333333333) internal successors, (201), 35 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:35,727 INFO L93 Difference]: Finished difference Result 198 states and 201 transitions. [2021-11-12 23:19:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-12 23:19:35,727 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.583333333333333) internal successors, (201), 35 states have internal predecessors, (201), 0 states have call successors, (0), 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 180 [2021-11-12 23:19:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:35,732 INFO L225 Difference]: With dead ends: 198 [2021-11-12 23:19:35,732 INFO L226 Difference]: Without dead ends: 196 [2021-11-12 23:19:35,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 554 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1708, Invalid=4144, Unknown=0, NotChecked=0, Total=5852 [2021-11-12 23:19:35,733 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 166 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:35,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 296 Invalid, 452 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [125 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 196.40ms Time] [2021-11-12 23:19:35,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-12 23:19:35,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 189. [2021-11-12 23:19:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2021-11-12 23:19:35,753 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 180 [2021-11-12 23:19:35,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:35,754 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2021-11-12 23:19:35,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.583333333333333) internal successors, (201), 35 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:35,754 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2021-11-12 23:19:35,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-12 23:19:35,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:35,755 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:35,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:35,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-11-12 23:19:35,969 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:35,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:35,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1867937509, now seen corresponding path program 36 times [2021-11-12 23:19:35,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:19:35,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752371056] [2021-11-12 23:19:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:35,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:19:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 1713 proven. 957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:37,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:19:37,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752371056] [2021-11-12 23:19:37,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752371056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:37,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387884294] [2021-11-12 23:19:37,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:19:37,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:37,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:37,175 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:19:37,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-12 23:19:37,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:19:37,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:19:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-12 23:19:37,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 1800 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:39,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 1800 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:39,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387884294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:19:39,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987204442] [2021-11-12 23:19:39,540 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:19:39,541 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:19:39,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:19:39,541 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:19:39,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:19:39,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,552 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:39,552 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:19:39,553 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:39,553 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,554 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:19:39,555 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:19:39,556 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_43|], 10=[|v_#valid_44|]} [2021-11-12 23:19:39,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:39,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:19:39,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:39,563 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:39,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:39,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:39,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:39,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:39,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:39,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:19:39,579 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:39,581 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:39,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:39,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,584 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,585 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:39,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:19:39,586 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:19:39,590 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:19:39,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:39,594 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,596 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:39,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:39,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:19:39,601 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:19:39,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:19:39,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,618 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:19:39,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:19:39,624 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:19:39,625 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:39,626 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:19:39,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:19:39,630 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:39,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,646 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,649 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:19:39,651 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:39,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:19:39,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,678 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:19:39,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:39,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:39,697 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:39,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:39,703 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:39,705 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:39,706 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:19:40,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:19:40,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:40,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 98 [2021-11-12 23:19:40,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731739364] [2021-11-12 23:19:40,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:19:40,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-12 23:19:40,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:19:40,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-12 23:19:40,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2270, Invalid=9072, Unknown=0, NotChecked=0, Total=11342 [2021-11-12 23:19:40,706 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand has 98 states, 98 states have (on average 3.316326530612245) internal successors, (325), 98 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:42,499 INFO L93 Difference]: Finished difference Result 532 states and 567 transitions. [2021-11-12 23:19:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-12 23:19:42,499 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.316326530612245) internal successors, (325), 98 states have internal predecessors, (325), 0 states have call successors, (0), 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 188 [2021-11-12 23:19:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:42,501 INFO L225 Difference]: With dead ends: 532 [2021-11-12 23:19:42,501 INFO L226 Difference]: Without dead ends: 286 [2021-11-12 23:19:42,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7374 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6206, Invalid=21850, Unknown=0, NotChecked=0, Total=28056 [2021-11-12 23:19:42,503 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 395 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 408.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.24ms SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 493.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:42,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 877 Invalid, 1254 Unknown, 0 Unchecked, 4.24ms Time], IncrementalHoareTripleChecker [330 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 493.65ms Time] [2021-11-12 23:19:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-12 23:19:42,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 193. [2021-11-12 23:19:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.015625) internal successors, (195), 192 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2021-11-12 23:19:42,523 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2021-11-12 23:19:42,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:42,523 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2021-11-12 23:19:42,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.316326530612245) internal successors, (325), 98 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:42,524 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2021-11-12 23:19:42,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-12 23:19:42,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:42,525 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:42,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:42,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:42,747 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:42,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:42,747 INFO L85 PathProgramCache]: Analyzing trace with hash -457698395, now seen corresponding path program 37 times [2021-11-12 23:19:42,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:19:42,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598708793] [2021-11-12 23:19:42,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:42,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:19:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 930 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:43,379 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:19:43,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598708793] [2021-11-12 23:19:43,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598708793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:43,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372885202] [2021-11-12 23:19:43,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:19:43,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:43,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:43,387 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:19:43,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-12 23:19:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:43,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-12 23:19:43,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:43,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:44,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372885202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:19:44,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808689253] [2021-11-12 23:19:44,296 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:19:44,297 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:19:44,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:19:44,297 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:19:44,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:19:44,300 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,301 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:44,301 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,301 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:19:44,301 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:44,302 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,302 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:19:44,303 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:19:44,305 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_44|], 10=[|v_#valid_45|]} [2021-11-12 23:19:44,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:44,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:19:44,310 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,310 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:44,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,311 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:44,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:44,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:44,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:44,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:44,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:44,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:19:44,321 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,322 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:44,322 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,322 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:44,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:44,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,325 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,325 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:44,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:19:44,325 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:19:44,328 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:19:44,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:44,331 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,332 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:44,333 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:44,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:19:44,336 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:19:44,338 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:19:44,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,361 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:19:44,363 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:19:44,368 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:19:44,369 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:44,369 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:19:44,371 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:19:44,374 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,376 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:44,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,386 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:19:44,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:44,391 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:19:44,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,406 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:19:44,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:44,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:44,417 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:44,418 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:44,435 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:44,437 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:44,439 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:19:45,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:19:45,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:45,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 37 [2021-11-12 23:19:45,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370180590] [2021-11-12 23:19:45,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:19:45,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-12 23:19:45,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:19:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-12 23:19:45,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=1512, Unknown=0, NotChecked=0, Total=2162 [2021-11-12 23:19:45,086 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 38 states, 38 states have (on average 5.605263157894737) internal successors, (213), 37 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:45,665 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2021-11-12 23:19:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-12 23:19:45,665 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.605263157894737) internal successors, (213), 37 states have internal predecessors, (213), 0 states have call successors, (0), 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 192 [2021-11-12 23:19:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:45,666 INFO L225 Difference]: With dead ends: 210 [2021-11-12 23:19:45,666 INFO L226 Difference]: Without dead ends: 208 [2021-11-12 23:19:45,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 592 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1913, Invalid=4567, Unknown=0, NotChecked=0, Total=6480 [2021-11-12 23:19:45,667 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 212 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:45,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 244 Invalid, 425 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [134 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 167.71ms Time] [2021-11-12 23:19:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-12 23:19:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2021-11-12 23:19:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.015) internal successors, (203), 200 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2021-11-12 23:19:45,680 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 192 [2021-11-12 23:19:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:45,680 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2021-11-12 23:19:45,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.605263157894737) internal successors, (213), 37 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2021-11-12 23:19:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-12 23:19:45,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:45,681 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:45,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:45,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-11-12 23:19:45,882 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:45,883 INFO L85 PathProgramCache]: Analyzing trace with hash -86183797, now seen corresponding path program 38 times [2021-11-12 23:19:45,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:19:45,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533929993] [2021-11-12 23:19:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:45,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:19:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 1955 proven. 1085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:47,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:19:47,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533929993] [2021-11-12 23:19:47,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533929993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:47,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164201610] [2021-11-12 23:19:47,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:19:47,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:47,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:47,313 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:19:47,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-12 23:19:47,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-11-12 23:19:47,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:19:47,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-12 23:19:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2048 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:49,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2048 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:49,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164201610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:19:49,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271355601] [2021-11-12 23:19:49,919 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:19:49,919 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:19:49,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:19:49,919 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:19:49,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:19:49,927 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:49,928 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:49,928 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:49,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:19:49,928 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:49,928 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:49,929 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:19:49,929 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:19:49,930 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_45|], 10=[|v_#valid_46|]} [2021-11-12 23:19:49,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:49,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:19:49,939 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:49,939 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:49,939 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:49,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:49,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:49,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:49,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:49,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:49,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:49,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:19:49,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:49,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:49,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:49,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:49,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:49,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:49,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:49,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:49,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:49,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:19:49,957 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:19:49,959 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:19:49,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:49,962 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:49,963 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:49,964 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:49,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:49,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:19:49,968 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:19:49,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:19:49,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:49,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:49,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:49,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:49,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:49,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:49,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:49,993 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:19:49,995 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:19:49,998 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:19:49,999 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:49,999 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:50,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:19:50,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:19:50,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:50,004 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:50,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:50,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:19:50,044 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:50,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:19:50,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,062 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:19:50,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:50,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:50,074 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:50,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:50,090 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:50,092 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:50,096 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:19:51,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:19:51,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:51,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 104 [2021-11-12 23:19:51,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929231196] [2021-11-12 23:19:51,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:19:51,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-12 23:19:51,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:19:51,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-12 23:19:51,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2546, Invalid=10110, Unknown=0, NotChecked=0, Total=12656 [2021-11-12 23:19:51,060 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand has 104 states, 104 states have (on average 3.3173076923076925) internal successors, (345), 104 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:52,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:52,957 INFO L93 Difference]: Finished difference Result 566 states and 603 transitions. [2021-11-12 23:19:52,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-12 23:19:52,958 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.3173076923076925) internal successors, (345), 104 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-12 23:19:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:52,959 INFO L225 Difference]: With dead ends: 566 [2021-11-12 23:19:52,959 INFO L226 Difference]: Without dead ends: 304 [2021-11-12 23:19:52,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8246 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7000, Invalid=24506, Unknown=0, NotChecked=0, Total=31506 [2021-11-12 23:19:52,963 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 485 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 396.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.23ms SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 481.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:52,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 841 Invalid, 1276 Unknown, 0 Unchecked, 4.23ms Time], IncrementalHoareTripleChecker [385 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 481.98ms Time] [2021-11-12 23:19:52,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-12 23:19:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 205. [2021-11-12 23:19:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0147058823529411) internal successors, (207), 204 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2021-11-12 23:19:52,986 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2021-11-12 23:19:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:52,986 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2021-11-12 23:19:52,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.3173076923076925) internal successors, (345), 104 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2021-11-12 23:19:52,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-12 23:19:52,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:52,988 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:53,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:53,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-11-12 23:19:53,202 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:53,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:53,203 INFO L85 PathProgramCache]: Analyzing trace with hash -569508843, now seen corresponding path program 39 times [2021-11-12 23:19:53,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:19:53,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058637003] [2021-11-12 23:19:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:53,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:19:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1056 proven. 2114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:53,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:19:53,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058637003] [2021-11-12 23:19:53,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058637003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:53,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975782737] [2021-11-12 23:19:53,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:19:53,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:53,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:53,864 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:19:53,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-12 23:19:53,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:19:53,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:19:53,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-12 23:19:53,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1122 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:54,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1122 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:54,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975782737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:19:54,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503853383] [2021-11-12 23:19:54,756 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:19:54,756 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:19:54,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:19:54,756 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:19:54,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:19:54,759 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,759 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:54,759 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,759 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:19:54,760 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:54,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,760 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:19:54,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:19:54,762 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_46|], 10=[|v_#valid_47|]} [2021-11-12 23:19:54,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:54,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:19:54,768 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,768 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:54,768 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:54,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:54,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:54,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:54,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:54,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:54,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:19:54,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:54,778 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:19:54,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:19:54,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,781 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,781 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:54,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:19:54,781 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:19:54,784 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:19:54,785 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:19:54,787 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,788 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:54,789 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:19:54,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:19:54,792 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:19:54,794 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:19:54,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,803 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:19:54,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:19:54,808 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:19:54,808 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:19:54,809 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:19:54,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:19:54,812 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:54,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,823 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,824 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:19:54,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:19:54,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:19:54,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,842 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:19:54,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:19:54,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:19:54,872 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:54,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:54,880 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:19:54,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:19:54,884 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:19:55,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:19:55,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:55,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 39 [2021-11-12 23:19:55,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348581130] [2021-11-12 23:19:55,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:19:55,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-12 23:19:55,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:19:55,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-12 23:19:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=721, Invalid=1631, Unknown=0, NotChecked=0, Total=2352 [2021-11-12 23:19:55,555 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 40 states, 40 states have (on average 5.625) internal successors, (225), 39 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:56,190 INFO L93 Difference]: Finished difference Result 222 states and 225 transitions. [2021-11-12 23:19:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-12 23:19:56,190 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.625) internal successors, (225), 39 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-12 23:19:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:56,191 INFO L225 Difference]: With dead ends: 222 [2021-11-12 23:19:56,191 INFO L226 Difference]: Without dead ends: 220 [2021-11-12 23:19:56,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 630 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2130, Invalid=5010, Unknown=0, NotChecked=0, Total=7140 [2021-11-12 23:19:56,193 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 186 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.49ms SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 189.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:56,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 319 Invalid, 501 Unknown, 0 Unchecked, 1.49ms Time], IncrementalHoareTripleChecker [141 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 189.92ms Time] [2021-11-12 23:19:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-12 23:19:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 213. [2021-11-12 23:19:56,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2021-11-12 23:19:56,207 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 204 [2021-11-12 23:19:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:56,207 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2021-11-12 23:19:56,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.625) internal successors, (225), 39 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:56,207 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2021-11-12 23:19:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-12 23:19:56,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:56,208 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:56,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:56,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:56,409 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:56,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1313117957, now seen corresponding path program 40 times [2021-11-12 23:19:56,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:19:56,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129620338] [2021-11-12 23:19:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:56,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:19:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2213 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:19:57,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:19:57,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129620338] [2021-11-12 23:19:57,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129620338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:57,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308295307] [2021-11-12 23:19:57,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:19:57,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:19:57,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:57,820 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:19:57,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-12 23:19:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:57,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-12 23:19:57,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2310 proven. 1122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:20:00,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2310 proven. 1122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:20:00,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308295307] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:20:00,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [120529925] [2021-11-12 23:20:00,499 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:20:00,499 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:20:00,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:20:00,499 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:20:00,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:20:00,513 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,514 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:00,515 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,515 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:20:00,515 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:00,516 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:20:00,517 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:20:00,519 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_47|], 10=[|v_#valid_48|]} [2021-11-12 23:20:00,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:20:00,525 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:00,525 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:00,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:00,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:20:00,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:00,538 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,539 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:00,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:00,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,541 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,541 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:00,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:20:00,542 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:20:00,545 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:20:00,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:00,548 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,549 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:00,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,550 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:00,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:20:00,552 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:20:00,554 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:20:00,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,565 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:20:00,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:20:00,569 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:20:00,570 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:00,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:20:00,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:20:00,573 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:20:00,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:20:00,601 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:00,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:20:00,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,626 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:20:00,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:20:00,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:00,642 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:00,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:00,648 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:00,649 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:00,651 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:20:01,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:20:01,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:20:01,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 107 [2021-11-12 23:20:01,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489820986] [2021-11-12 23:20:01,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:20:01,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-12 23:20:01,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:01,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-12 23:20:01,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2655, Invalid=10685, Unknown=0, NotChecked=0, Total=13340 [2021-11-12 23:20:01,632 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand has 107 states, 107 states have (on average 3.3271028037383177) internal successors, (356), 107 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:02,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:02,853 INFO L93 Difference]: Finished difference Result 458 states and 495 transitions. [2021-11-12 23:20:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-12 23:20:02,853 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.3271028037383177) internal successors, (356), 107 states have internal predecessors, (356), 0 states have call successors, (0), 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 212 [2021-11-12 23:20:02,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:02,854 INFO L225 Difference]: With dead ends: 458 [2021-11-12 23:20:02,854 INFO L226 Difference]: Without dead ends: 317 [2021-11-12 23:20:02,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5037, Invalid=17313, Unknown=0, NotChecked=0, Total=22350 [2021-11-12 23:20:02,856 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 299 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 334.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 410.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:02,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 821 Invalid, 1109 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [240 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 410.27ms Time] [2021-11-12 23:20:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-12 23:20:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 215. [2021-11-12 23:20:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.014018691588785) internal successors, (217), 214 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) [2021-11-12 23:20:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2021-11-12 23:20:02,880 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 212 [2021-11-12 23:20:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:02,881 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2021-11-12 23:20:02,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.3271028037383177) internal successors, (356), 107 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2021-11-12 23:20:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-12 23:20:02,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:02,883 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:02,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:03,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1056,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:03,107 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:03,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:03,107 INFO L85 PathProgramCache]: Analyzing trace with hash 748798432, now seen corresponding path program 41 times [2021-11-12 23:20:03,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:03,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133099373] [2021-11-12 23:20:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:03,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 2213 proven. 1289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:04,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:04,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133099373] [2021-11-12 23:20:04,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133099373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:04,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434240396] [2021-11-12 23:20:04,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:20:04,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:04,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:04,620 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:20:04,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-12 23:20:04,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-11-12 23:20:04,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:20:04,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-12 23:20:04,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 2312 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:07,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 2312 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:07,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434240396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:20:07,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307393681] [2021-11-12 23:20:07,453 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:20:07,453 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:20:07,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:20:07,453 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:20:07,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:20:07,456 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,457 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:07,457 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,457 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:20:07,458 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:07,458 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,458 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:20:07,459 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:20:07,461 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_48|], 10=[|v_#valid_49|]} [2021-11-12 23:20:07,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:07,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:20:07,467 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:07,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,468 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:07,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:07,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:07,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:07,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:07,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:20:07,479 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,480 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:07,481 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,481 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:07,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:07,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,485 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:07,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:20:07,486 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:20:07,490 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:20:07,491 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:07,494 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,496 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:07,496 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,497 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:07,498 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:20:07,501 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:20:07,503 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:20:07,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,517 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:20:07,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:20:07,522 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:20:07,523 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:07,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:20:07,527 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:20:07,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,531 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:20:07,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:20:07,545 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:07,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:20:07,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,560 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:20:07,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:20:07,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:07,570 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:07,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:07,575 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:07,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:07,578 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:20:08,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:20:08,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:20:08,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 109 [2021-11-12 23:20:08,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787558303] [2021-11-12 23:20:08,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:20:08,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-12 23:20:08,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:08,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-12 23:20:08,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2765, Invalid=11041, Unknown=0, NotChecked=0, Total=13806 [2021-11-12 23:20:08,592 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 109 states, 109 states have (on average 3.2844036697247705) internal successors, (358), 109 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:09,832 INFO L93 Difference]: Finished difference Result 465 states and 503 transitions. [2021-11-12 23:20:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-12 23:20:09,832 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.2844036697247705) internal successors, (358), 109 states have internal predecessors, (358), 0 states have call successors, (0), 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 214 [2021-11-12 23:20:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:09,833 INFO L225 Difference]: With dead ends: 465 [2021-11-12 23:20:09,833 INFO L226 Difference]: Without dead ends: 322 [2021-11-12 23:20:09,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 596 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5781 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5287, Invalid=17969, Unknown=0, NotChecked=0, Total=23256 [2021-11-12 23:20:09,835 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 384 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 312.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.15ms SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 384.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:09,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 670 Invalid, 1023 Unknown, 0 Unchecked, 3.15ms Time], IncrementalHoareTripleChecker [322 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 384.39ms Time] [2021-11-12 23:20:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-12 23:20:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 217. [2021-11-12 23:20:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2021-11-12 23:20:09,855 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 214 [2021-11-12 23:20:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:09,856 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2021-11-12 23:20:09,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.2844036697247705) internal successors, (358), 109 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:09,856 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2021-11-12 23:20:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-12 23:20:09,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:09,857 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:09,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:10,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1083 [2021-11-12 23:20:10,057 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:10,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2024442491, now seen corresponding path program 42 times [2021-11-12 23:20:10,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:10,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740611831] [2021-11-12 23:20:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:10,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1190 proven. 2382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:10,738 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:10,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740611831] [2021-11-12 23:20:10,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740611831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:10,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014565463] [2021-11-12 23:20:10,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:20:10,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:10,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:10,739 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:20:10,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-12 23:20:10,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:20:10,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:20:10,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-12 23:20:10,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1260 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:11,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1260 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:11,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014565463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:20:11,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1089617475] [2021-11-12 23:20:11,728 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:20:11,728 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:20:11,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:20:11,728 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:20:11,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:20:11,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,739 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:11,740 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,740 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:20:11,740 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:11,740 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:20:11,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:20:11,742 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_49|], 10=[|v_#valid_50|]} [2021-11-12 23:20:11,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:11,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:20:11,749 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,749 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:11,749 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,749 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:11,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:11,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:11,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:11,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:20:11,758 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:11,784 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,785 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:11,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:11,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,788 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,789 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:11,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:20:11,789 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:20:11,794 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:20:11,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:11,798 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,800 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:11,800 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:11,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:20:11,825 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:20:11,828 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:20:11,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,842 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:20:11,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:20:11,849 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:20:11,850 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:11,851 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:20:11,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:20:11,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,857 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:20:11,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:20:11,877 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:11,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:20:11,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,900 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:20:11,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:20:11,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:11,916 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:11,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:11,924 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:11,926 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:11,928 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:20:12,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:20:12,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:20:12,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 41 [2021-11-12 23:20:12,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545270901] [2021-11-12 23:20:12,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:20:12,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-12 23:20:12,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:12,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-12 23:20:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=1754, Unknown=0, NotChecked=0, Total=2550 [2021-11-12 23:20:12,661 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 42 states, 42 states have (on average 5.642857142857143) internal successors, (237), 41 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:13,352 INFO L93 Difference]: Finished difference Result 234 states and 237 transitions. [2021-11-12 23:20:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-12 23:20:13,353 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.642857142857143) internal successors, (237), 41 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-11-12 23:20:13,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:13,354 INFO L225 Difference]: With dead ends: 234 [2021-11-12 23:20:13,354 INFO L226 Difference]: Without dead ends: 232 [2021-11-12 23:20:13,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 668 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2199 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2359, Invalid=5473, Unknown=0, NotChecked=0, Total=7832 [2021-11-12 23:20:13,355 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 264 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:13,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 294 Invalid, 528 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [185 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 206.72ms Time] [2021-11-12 23:20:13,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-12 23:20:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2021-11-12 23:20:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0133928571428572) internal successors, (227), 224 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2021-11-12 23:20:13,376 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 216 [2021-11-12 23:20:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:13,376 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2021-11-12 23:20:13,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.642857142857143) internal successors, (237), 41 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2021-11-12 23:20:13,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-12 23:20:13,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:13,378 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:13,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:13,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-11-12 23:20:13,587 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:13,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1516925547, now seen corresponding path program 43 times [2021-11-12 23:20:13,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:13,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017252583] [2021-11-12 23:20:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:13,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2487 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:15,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:15,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017252583] [2021-11-12 23:20:15,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017252583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:15,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923485698] [2021-11-12 23:20:15,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:20:15,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:15,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:15,154 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:20:15,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-12 23:20:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:15,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-12 23:20:15,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2590 proven. 1260 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:20:17,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2590 proven. 1260 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:20:18,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923485698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:20:18,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [350089623] [2021-11-12 23:20:18,031 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:20:18,032 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:20:18,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:20:18,032 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:20:18,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:20:18,036 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,037 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:18,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:20:18,038 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:18,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:20:18,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:20:18,041 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_50|], 10=[|v_#valid_51|]} [2021-11-12 23:20:18,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:18,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:20:18,049 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:18,050 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:18,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:18,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:18,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:18,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:18,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:18,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:20:18,061 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:18,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:18,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:18,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,067 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:18,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:20:18,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:20:18,072 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:20:18,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:18,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,077 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:18,078 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:18,081 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:20:18,083 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:20:18,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:20:18,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,095 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:20:18,097 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:20:18,099 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:20:18,100 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:18,101 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:20:18,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:20:18,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:20:18,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,122 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:20:18,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:18,125 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:20:18,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,142 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:20:18,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:20:18,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:18,158 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:18,160 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:18,166 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:18,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:18,170 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:20:19,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:20:19,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:20:19,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 113 [2021-11-12 23:20:19,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841714509] [2021-11-12 23:20:19,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:20:19,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-12 23:20:19,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:19,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-12 23:20:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2953, Invalid=11809, Unknown=0, NotChecked=0, Total=14762 [2021-11-12 23:20:19,233 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand has 113 states, 113 states have (on average 3.327433628318584) internal successors, (376), 113 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:20,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:20,619 INFO L93 Difference]: Finished difference Result 484 states and 523 transitions. [2021-11-12 23:20:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-12 23:20:20,619 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.327433628318584) internal successors, (376), 113 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-11-12 23:20:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:20,621 INFO L225 Difference]: With dead ends: 484 [2021-11-12 23:20:20,621 INFO L226 Difference]: Without dead ends: 335 [2021-11-12 23:20:20,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6189 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5619, Invalid=19187, Unknown=0, NotChecked=0, Total=24806 [2021-11-12 23:20:20,623 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 332 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 381.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.79ms SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 467.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:20,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 871 Invalid, 1241 Unknown, 0 Unchecked, 3.79ms Time], IncrementalHoareTripleChecker [336 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 467.00ms Time] [2021-11-12 23:20:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-12 23:20:20,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 227. [2021-11-12 23:20:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0132743362831858) internal successors, (229), 226 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2021-11-12 23:20:20,648 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2021-11-12 23:20:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:20,648 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2021-11-12 23:20:20,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.327433628318584) internal successors, (376), 113 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:20,649 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2021-11-12 23:20:20,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-12 23:20:20,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:20,650 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:20,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:20,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1137,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:20,867 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:20,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash 297901008, now seen corresponding path program 44 times [2021-11-12 23:20:20,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:20,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114112411] [2021-11-12 23:20:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:20,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 2487 proven. 1437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:22,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:22,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114112411] [2021-11-12 23:20:22,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114112411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:22,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563488524] [2021-11-12 23:20:22,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:20:22,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:22,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:22,437 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:20:22,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-12 23:20:22,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2021-11-12 23:20:22,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:20:22,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-12 23:20:22,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 2592 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:25,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 2592 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:25,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563488524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:20:25,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7523266] [2021-11-12 23:20:25,596 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:20:25,597 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:20:25,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:20:25,597 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:20:25,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:20:25,600 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,600 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:25,601 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:20:25,602 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:25,602 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:20:25,603 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:20:25,605 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_51|], 10=[|v_#valid_52|]} [2021-11-12 23:20:25,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:25,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:20:25,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:25,615 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,615 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:25,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:25,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:25,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:25,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:25,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:25,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:20:25,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:25,628 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:25,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:25,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,632 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:25,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:20:25,633 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:20:25,638 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:20:25,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:25,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,644 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:25,644 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:25,647 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:20:25,649 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:20:25,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:20:25,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,667 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:20:25,669 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:20:25,673 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:20:25,674 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:25,675 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,676 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:20:25,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:20:25,679 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,681 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:20:25,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,697 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:20:25,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:25,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:20:25,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,721 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:20:25,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:20:25,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:25,731 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:25,733 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:25,739 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:25,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:25,742 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:20:26,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:20:26,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:20:26,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 115 [2021-11-12 23:20:26,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255323871] [2021-11-12 23:20:26,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:20:26,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-12 23:20:26,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:26,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-12 23:20:26,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3069, Invalid=12183, Unknown=0, NotChecked=0, Total=15252 [2021-11-12 23:20:26,785 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand has 115 states, 115 states have (on average 3.2869565217391306) internal successors, (378), 115 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:28,245 INFO L93 Difference]: Finished difference Result 491 states and 531 transitions. [2021-11-12 23:20:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-12 23:20:28,245 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 3.2869565217391306) internal successors, (378), 115 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2021-11-12 23:20:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:28,247 INFO L225 Difference]: With dead ends: 491 [2021-11-12 23:20:28,247 INFO L226 Difference]: Without dead ends: 340 [2021-11-12 23:20:28,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 630 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6370 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5883, Invalid=19877, Unknown=0, NotChecked=0, Total=25760 [2021-11-12 23:20:28,250 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 281 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 382.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.84ms SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 466.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:28,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 918 Invalid, 1197 Unknown, 0 Unchecked, 3.84ms Time], IncrementalHoareTripleChecker [238 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 466.43ms Time] [2021-11-12 23:20:28,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-12 23:20:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 229. [2021-11-12 23:20:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2021-11-12 23:20:28,276 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 226 [2021-11-12 23:20:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:28,277 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2021-11-12 23:20:28,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 3.2869565217391306) internal successors, (378), 115 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2021-11-12 23:20:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-12 23:20:28,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:28,278 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:28,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:28,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:28,502 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:28,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:28,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1341390837, now seen corresponding path program 45 times [2021-11-12 23:20:28,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:28,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380062272] [2021-11-12 23:20:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:28,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1332 proven. 2666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:29,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:29,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380062272] [2021-11-12 23:20:29,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380062272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:29,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715711027] [2021-11-12 23:20:29,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:20:29,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:29,188 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:20:29,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-12 23:20:29,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:20:29,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:20:29,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-12 23:20:29,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1406 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:29,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1406 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:30,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715711027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:20:30,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447869726] [2021-11-12 23:20:30,222 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:20:30,222 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:20:30,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:20:30,222 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:20:30,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:20:30,224 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,225 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:30,225 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:20:30,225 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:30,226 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:20:30,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:20:30,228 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_52|], 10=[|v_#valid_53|]} [2021-11-12 23:20:30,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:30,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:20:30,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:30,233 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:30,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:30,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:30,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:30,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:30,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:20:30,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:30,243 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,243 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:30,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:30,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,245 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:30,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:20:30,246 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:20:30,249 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:20:30,250 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:30,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,253 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:30,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:30,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:20:30,256 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:20:30,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:20:30,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,280 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:20:30,282 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:20:30,285 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:20:30,286 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:30,286 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:20:30,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:20:30,289 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,290 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:20:30,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:20:30,319 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:30,322 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:20:30,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,344 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:20:30,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:20:30,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:30,360 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:30,362 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:30,367 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:30,369 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:30,371 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:20:31,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:20:31,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:20:31,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 43 [2021-11-12 23:20:31,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584187830] [2021-11-12 23:20:31,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:20:31,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-12 23:20:31,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:31,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-12 23:20:31,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-11-12 23:20:31,106 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand has 44 states, 44 states have (on average 5.659090909090909) internal successors, (249), 43 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:31,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:31,869 INFO L93 Difference]: Finished difference Result 246 states and 249 transitions. [2021-11-12 23:20:31,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-12 23:20:31,870 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.659090909090909) internal successors, (249), 43 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-11-12 23:20:31,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:31,871 INFO L225 Difference]: With dead ends: 246 [2021-11-12 23:20:31,872 INFO L226 Difference]: Without dead ends: 244 [2021-11-12 23:20:31,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 706 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2600, Invalid=5956, Unknown=0, NotChecked=0, Total=8556 [2021-11-12 23:20:31,873 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 208 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 186.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.85ms SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:31,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 345 Invalid, 557 Unknown, 0 Unchecked, 1.85ms Time], IncrementalHoareTripleChecker [157 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 228.27ms Time] [2021-11-12 23:20:31,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-12 23:20:31,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 237. [2021-11-12 23:20:31,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 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) [2021-11-12 23:20:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 239 transitions. [2021-11-12 23:20:31,909 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 239 transitions. Word has length 228 [2021-11-12 23:20:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:31,910 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 239 transitions. [2021-11-12 23:20:31,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.659090909090909) internal successors, (249), 43 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 239 transitions. [2021-11-12 23:20:31,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-12 23:20:31,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:31,912 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:31,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:32,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1191 [2021-11-12 23:20:32,125 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1724878043, now seen corresponding path program 46 times [2021-11-12 23:20:32,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:32,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494414576] [2021-11-12 23:20:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:32,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2777 proven. 1517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:33,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:33,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494414576] [2021-11-12 23:20:33,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494414576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:33,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202580183] [2021-11-12 23:20:33,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:20:33,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:33,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:33,788 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:20:33,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-12 23:20:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:33,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-12 23:20:33,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2886 proven. 1406 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:20:36,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2886 proven. 1406 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:20:36,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202580183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:20:36,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1495285645] [2021-11-12 23:20:36,949 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:20:36,949 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:20:36,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:20:36,950 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:20:36,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:20:36,952 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:36,952 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:36,952 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:36,952 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:20:36,953 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:36,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:36,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:20:36,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:20:36,955 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_53|], 10=[|v_#valid_54|]} [2021-11-12 23:20:36,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:36,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:20:36,959 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:36,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:36,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:36,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:36,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:36,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:36,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:36,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:36,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:36,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:36,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:36,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:20:36,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:36,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:36,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:36,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:36,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:36,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:36,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:36,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:36,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:36,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:20:36,973 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:20:36,976 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:20:36,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:36,979 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:36,980 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:36,980 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:36,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:36,982 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:20:36,983 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:20:36,985 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:20:36,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:36,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:36,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:36,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:36,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:36,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:36,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:36,995 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:20:36,997 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:20:37,000 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:20:37,000 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:37,001 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:37,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:20:37,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:20:37,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:37,005 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:20:37,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:37,016 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:20:37,018 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:37,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:20:37,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,034 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:20:37,035 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:20:37,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:37,044 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:37,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:37,050 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:37,051 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:37,052 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:20:38,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:20:38,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:20:38,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 119 [2021-11-12 23:20:38,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311117233] [2021-11-12 23:20:38,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:20:38,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-12 23:20:38,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:38,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-12 23:20:38,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3267, Invalid=12989, Unknown=0, NotChecked=0, Total=16256 [2021-11-12 23:20:38,097 INFO L87 Difference]: Start difference. First operand 237 states and 239 transitions. Second operand has 119 states, 119 states have (on average 3.327731092436975) internal successors, (396), 119 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:39,647 INFO L93 Difference]: Finished difference Result 510 states and 551 transitions. [2021-11-12 23:20:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-12 23:20:39,647 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.327731092436975) internal successors, (396), 119 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-11-12 23:20:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:39,649 INFO L225 Difference]: With dead ends: 510 [2021-11-12 23:20:39,649 INFO L226 Difference]: Without dead ends: 353 [2021-11-12 23:20:39,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 659 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6798 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6233, Invalid=21157, Unknown=0, NotChecked=0, Total=27390 [2021-11-12 23:20:39,650 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 382 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 390.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.12ms SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 489.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:39,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 802 Invalid, 1256 Unknown, 0 Unchecked, 4.12ms Time], IncrementalHoareTripleChecker [408 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 489.31ms Time] [2021-11-12 23:20:39,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-12 23:20:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 239. [2021-11-12 23:20:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0126050420168067) internal successors, (241), 238 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2021-11-12 23:20:39,683 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 236 [2021-11-12 23:20:39,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:39,683 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2021-11-12 23:20:39,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.327731092436975) internal successors, (396), 119 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2021-11-12 23:20:39,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-12 23:20:39,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:39,685 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:39,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:39,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1218 [2021-11-12 23:20:39,898 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:39,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:39,898 INFO L85 PathProgramCache]: Analyzing trace with hash -379402560, now seen corresponding path program 47 times [2021-11-12 23:20:39,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:39,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449945689] [2021-11-12 23:20:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:39,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2777 proven. 1593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:41,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:41,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449945689] [2021-11-12 23:20:41,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449945689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:41,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760468302] [2021-11-12 23:20:41,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:20:41,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:41,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:41,609 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:20:41,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-12 23:20:41,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-11-12 23:20:41,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:20:41,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-12 23:20:41,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2888 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:44,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2888 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:44,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760468302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:20:44,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915591229] [2021-11-12 23:20:44,984 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:20:44,984 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:20:44,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:20:44,984 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:20:44,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:20:45,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,006 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:45,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:20:45,007 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:45,007 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:20:45,009 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:20:45,010 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_54|], 10=[|v_#valid_55|]} [2021-11-12 23:20:45,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:45,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:20:45,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:45,017 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:45,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:45,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:45,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:45,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:45,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:45,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:20:45,027 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:45,028 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:45,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:45,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,030 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,031 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:45,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:20:45,031 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:20:45,043 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:20:45,045 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:45,047 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,049 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:45,050 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,051 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:45,052 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:20:45,055 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:20:45,058 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:20:45,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,072 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:20:45,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:20:45,078 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:20:45,079 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:45,080 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,081 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:20:45,082 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:20:45,084 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,086 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:20:45,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:20:45,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:45,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:20:45,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,123 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:20:45,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:20:45,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:45,144 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:45,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:45,150 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:45,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:45,153 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:20:46,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:20:46,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:20:46,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 121 [2021-11-12 23:20:46,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344530678] [2021-11-12 23:20:46,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:20:46,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-11-12 23:20:46,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:46,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-11-12 23:20:46,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3389, Invalid=13381, Unknown=0, NotChecked=0, Total=16770 [2021-11-12 23:20:46,206 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand has 121 states, 121 states have (on average 3.2892561983471076) internal successors, (398), 121 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:47,683 INFO L93 Difference]: Finished difference Result 517 states and 559 transitions. [2021-11-12 23:20:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-12 23:20:47,684 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.2892561983471076) internal successors, (398), 121 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-12 23:20:47,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:47,685 INFO L225 Difference]: With dead ends: 517 [2021-11-12 23:20:47,685 INFO L226 Difference]: Without dead ends: 358 [2021-11-12 23:20:47,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6987 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6511, Invalid=21881, Unknown=0, NotChecked=0, Total=28392 [2021-11-12 23:20:47,687 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 343 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 354.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.38ms SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 433.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:47,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 853 Invalid, 1169 Unknown, 0 Unchecked, 3.38ms Time], IncrementalHoareTripleChecker [277 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 433.57ms Time] [2021-11-12 23:20:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-12 23:20:47,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 241. [2021-11-12 23:20:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0125) internal successors, (243), 240 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2021-11-12 23:20:47,708 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 238 [2021-11-12 23:20:47,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:47,708 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2021-11-12 23:20:47,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.2892561983471076) internal successors, (398), 121 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2021-11-12 23:20:47,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-12 23:20:47,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:47,710 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:47,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:47,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-11-12 23:20:47,927 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:47,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:47,927 INFO L85 PathProgramCache]: Analyzing trace with hash 336534373, now seen corresponding path program 48 times [2021-11-12 23:20:47,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:47,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545648239] [2021-11-12 23:20:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:47,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1482 proven. 2966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:48,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:48,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545648239] [2021-11-12 23:20:48,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545648239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:48,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668875533] [2021-11-12 23:20:48,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:20:48,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:48,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:48,695 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:20:48,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-12 23:20:48,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:20:48,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:20:48,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-12 23:20:48,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1560 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:49,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1560 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:49,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668875533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:20:49,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [585796220] [2021-11-12 23:20:49,764 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:20:49,764 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:20:49,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:20:49,765 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:20:49,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:20:49,769 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,769 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:49,769 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,770 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:20:49,770 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:49,770 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,770 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:20:49,771 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:20:49,772 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_55|], 10=[|v_#valid_56|]} [2021-11-12 23:20:49,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:49,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:20:49,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,777 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:49,778 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:49,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:49,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:49,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:49,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:49,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:20:49,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:49,814 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,815 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:49,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:49,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:49,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:20:49,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:20:49,825 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:20:49,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:49,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,832 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:49,833 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,834 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:49,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:20:49,838 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:20:49,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:20:49,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,872 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:20:49,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:20:49,879 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:20:49,880 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:49,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:20:49,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:20:49,883 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:20:49,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:20:49,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:49,901 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:20:49,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,914 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:20:49,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:20:49,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:49,926 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:49,927 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:49,931 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:49,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:49,934 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:20:50,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:20:50,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:20:50,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 45 [2021-11-12 23:20:50,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777577983] [2021-11-12 23:20:50,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:20:50,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-12 23:20:50,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:50,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-12 23:20:50,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=2012, Unknown=0, NotChecked=0, Total=2970 [2021-11-12 23:20:50,630 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand has 46 states, 46 states have (on average 5.673913043478261) internal successors, (261), 45 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:51,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:51,414 INFO L93 Difference]: Finished difference Result 258 states and 261 transitions. [2021-11-12 23:20:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-12 23:20:51,415 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.673913043478261) internal successors, (261), 45 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2021-11-12 23:20:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:51,417 INFO L225 Difference]: With dead ends: 258 [2021-11-12 23:20:51,417 INFO L226 Difference]: Without dead ends: 256 [2021-11-12 23:20:51,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 744 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2853, Invalid=6459, Unknown=0, NotChecked=0, Total=9312 [2021-11-12 23:20:51,418 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 304 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 179.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 216.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:51,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 292 Invalid, 558 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [205 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 216.05ms Time] [2021-11-12 23:20:51,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-12 23:20:51,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 249. [2021-11-12 23:20:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0120967741935485) internal successors, (251), 248 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2021-11-12 23:20:51,447 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 240 [2021-11-12 23:20:51,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:51,448 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2021-11-12 23:20:51,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.673913043478261) internal successors, (261), 45 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:51,448 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2021-11-12 23:20:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-12 23:20:51,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:51,450 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:51,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:51,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:51,663 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:51,663 INFO L85 PathProgramCache]: Analyzing trace with hash -175097781, now seen corresponding path program 49 times [2021-11-12 23:20:51,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:51,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352929645] [2021-11-12 23:20:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:51,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3083 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:53,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:53,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352929645] [2021-11-12 23:20:53,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352929645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:53,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076979898] [2021-11-12 23:20:53,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:20:53,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:53,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:53,494 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:20:53,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-12 23:20:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:53,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-12 23:20:53,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3198 proven. 1560 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:20:56,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3198 proven. 1560 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:20:56,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076979898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:20:56,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949727016] [2021-11-12 23:20:56,933 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:20:56,933 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:20:56,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:20:56,934 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:20:56,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:20:56,944 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:56,945 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:56,945 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:56,945 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:20:56,946 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:56,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:56,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:20:56,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:20:56,949 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_56|], 10=[|v_#valid_57|]} [2021-11-12 23:20:56,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:56,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:20:56,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:56,955 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:56,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:56,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:56,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:56,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:56,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:56,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:56,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:56,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:56,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:56,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:20:56,967 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:56,968 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:56,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:56,968 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:20:56,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:20:56,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:56,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:56,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:56,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:56,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:20:56,973 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:20:56,976 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:20:56,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:20:56,979 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:56,980 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:56,980 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:56,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:20:56,982 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:20:56,983 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:20:56,985 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:20:56,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:56,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:56,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:56,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:56,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:56,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:56,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:56,995 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:20:56,996 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:20:56,999 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:20:57,000 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:20:57,000 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:57,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:20:57,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:20:57,003 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:57,004 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:20:57,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,014 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:57,016 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:20:57,017 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:57,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:20:57,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,033 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:20:57,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:20:57,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:20:57,043 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:57,044 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:57,048 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:20:57,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:20:57,050 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:20:58,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:20:58,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:20:58,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 125 [2021-11-12 23:20:58,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14259820] [2021-11-12 23:20:58,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:20:58,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-12 23:20:58,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:58,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-12 23:20:58,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3597, Invalid=14225, Unknown=0, NotChecked=0, Total=17822 [2021-11-12 23:20:58,119 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand has 125 states, 125 states have (on average 3.328) internal successors, (416), 125 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:59,776 INFO L93 Difference]: Finished difference Result 536 states and 579 transitions. [2021-11-12 23:20:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-12 23:20:59,777 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 3.328) internal successors, (416), 125 states have internal predecessors, (416), 0 states have call successors, (0), 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 248 [2021-11-12 23:20:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:59,778 INFO L225 Difference]: With dead ends: 536 [2021-11-12 23:20:59,778 INFO L226 Difference]: Without dead ends: 371 [2021-11-12 23:20:59,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 865 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7435 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6879, Invalid=23223, Unknown=0, NotChecked=0, Total=30102 [2021-11-12 23:20:59,781 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 465 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 391.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.83ms SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 514.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:59,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 776 Invalid, 1318 Unknown, 0 Unchecked, 3.83ms Time], IncrementalHoareTripleChecker [503 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 514.93ms Time] [2021-11-12 23:20:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-12 23:20:59,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 251. [2021-11-12 23:20:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.012) internal successors, (253), 250 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2021-11-12 23:20:59,814 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 248 [2021-11-12 23:20:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:59,814 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2021-11-12 23:20:59,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 3.328) internal successors, (416), 125 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2021-11-12 23:20:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-12 23:20:59,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:59,816 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:59,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:00,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-11-12 23:21:00,031 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:00,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1152728400, now seen corresponding path program 50 times [2021-11-12 23:21:00,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:21:00,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859534495] [2021-11-12 23:21:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:00,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:21:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 3083 proven. 1757 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:01,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:21:01,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859534495] [2021-11-12 23:21:01,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859534495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:21:01,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674124280] [2021-11-12 23:21:01,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:21:01,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:01,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:21:01,919 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:21:01,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-12 23:21:02,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2021-11-12 23:21:02,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:21:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-12 23:21:02,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 3200 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:05,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 3200 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:05,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674124280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:21:05,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256355157] [2021-11-12 23:21:05,506 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:21:05,506 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:21:05,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:21:05,507 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:21:05,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:21:05,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,510 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:05,510 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:21:05,510 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:05,511 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:21:05,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:21:05,512 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_57|], 10=[|v_#valid_58|]} [2021-11-12 23:21:05,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:05,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:21:05,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,517 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:05,518 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:05,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:05,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:05,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:05,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:05,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:21:05,526 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,527 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:05,527 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,527 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:05,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:05,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,530 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:05,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:21:05,530 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:21:05,533 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:21:05,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:05,536 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,537 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:05,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:05,539 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:21:05,540 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:21:05,542 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:21:05,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,552 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:21:05,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:21:05,578 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:21:05,579 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:05,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:21:05,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:21:05,584 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,585 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:21:05,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:21:05,600 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:05,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:21:05,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,615 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:21:05,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:21:05,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:05,625 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:05,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:05,630 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:05,631 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:05,632 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:21:06,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:21:06,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:21:06,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 127 [2021-11-12 23:21:06,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346753580] [2021-11-12 23:21:06,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:21:06,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-12 23:21:06,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:21:06,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-12 23:21:06,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3725, Invalid=14635, Unknown=0, NotChecked=0, Total=18360 [2021-11-12 23:21:06,753 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand has 127 states, 127 states have (on average 3.2913385826771653) internal successors, (418), 127 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:08,451 INFO L93 Difference]: Finished difference Result 543 states and 587 transitions. [2021-11-12 23:21:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-12 23:21:08,452 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 3.2913385826771653) internal successors, (418), 127 states have internal predecessors, (418), 0 states have call successors, (0), 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 250 [2021-11-12 23:21:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:08,453 INFO L225 Difference]: With dead ends: 543 [2021-11-12 23:21:08,453 INFO L226 Difference]: Without dead ends: 376 [2021-11-12 23:21:08,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7632 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7171, Invalid=23981, Unknown=0, NotChecked=0, Total=31152 [2021-11-12 23:21:08,455 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 352 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 409.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.15ms SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 504.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:08,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 963 Invalid, 1338 Unknown, 0 Unchecked, 4.15ms Time], IncrementalHoareTripleChecker [326 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 504.14ms Time] [2021-11-12 23:21:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-12 23:21:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 253. [2021-11-12 23:21:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:08,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2021-11-12 23:21:08,474 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 250 [2021-11-12 23:21:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:08,475 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2021-11-12 23:21:08,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 3.2913385826771653) internal successors, (418), 127 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2021-11-12 23:21:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-12 23:21:08,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:08,477 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:08,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:08,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1326,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:08,691 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:08,691 INFO L85 PathProgramCache]: Analyzing trace with hash -57915435, now seen corresponding path program 51 times [2021-11-12 23:21:08,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:21:08,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854602995] [2021-11-12 23:21:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:08,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:21:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1640 proven. 3282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:09,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:21:09,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854602995] [2021-11-12 23:21:09,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854602995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:21:09,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785164273] [2021-11-12 23:21:09,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:21:09,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:09,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:21:09,717 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:21:09,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-12 23:21:09,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:21:09,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:21:09,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 941 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-12 23:21:09,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1722 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:10,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1722 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:10,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785164273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:21:10,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785451351] [2021-11-12 23:21:10,891 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:21:10,891 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:21:10,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:21:10,892 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:21:10,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:21:10,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,894 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:10,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,894 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:21:10,895 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:10,895 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:21:10,896 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:21:10,897 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_58|], 10=[|v_#valid_59|]} [2021-11-12 23:21:10,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:10,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:21:10,905 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:10,906 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,906 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:10,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:10,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:10,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:10,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:10,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:10,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:21:10,915 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:10,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:10,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:10,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,919 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,919 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:10,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:21:10,919 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:21:10,922 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:21:10,923 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:10,925 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,926 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:10,927 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:10,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:21:10,930 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:21:10,932 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:21:10,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,941 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:21:10,943 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:21:10,945 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:21:10,946 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:10,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:21:10,948 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:21:10,949 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:21:10,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:21:10,963 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:10,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:21:10,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,978 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:21:10,979 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:21:10,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:10,988 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:10,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:10,993 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:10,995 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:10,996 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:21:11,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:21:11,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:21:11,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 47 [2021-11-12 23:21:11,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074449464] [2021-11-12 23:21:11,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:21:11,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-12 23:21:11,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:21:11,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-12 23:21:11,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1045, Invalid=2147, Unknown=0, NotChecked=0, Total=3192 [2021-11-12 23:21:11,725 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand has 48 states, 48 states have (on average 5.6875) internal successors, (273), 47 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:12,597 INFO L93 Difference]: Finished difference Result 270 states and 273 transitions. [2021-11-12 23:21:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-12 23:21:12,597 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.6875) internal successors, (273), 47 states have internal predecessors, (273), 0 states have call successors, (0), 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 252 [2021-11-12 23:21:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:12,598 INFO L225 Difference]: With dead ends: 270 [2021-11-12 23:21:12,599 INFO L226 Difference]: Without dead ends: 268 [2021-11-12 23:21:12,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 782 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2811 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3118, Invalid=6982, Unknown=0, NotChecked=0, Total=10100 [2021-11-12 23:21:12,600 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 317 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 235.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:12,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 316 Invalid, 594 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [215 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 235.59ms Time] [2021-11-12 23:21:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-12 23:21:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 261. [2021-11-12 23:21:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0115384615384615) internal successors, (263), 260 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2021-11-12 23:21:12,620 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 252 [2021-11-12 23:21:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:12,621 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2021-11-12 23:21:12,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.6875) internal successors, (273), 47 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:12,621 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2021-11-12 23:21:12,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-12 23:21:12,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:12,623 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:12,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:12,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1353,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:12,835 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:12,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1307446085, now seen corresponding path program 52 times [2021-11-12 23:21:12,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:21:12,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995371651] [2021-11-12 23:21:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:12,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:21:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3405 proven. 1845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:14,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:21:14,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995371651] [2021-11-12 23:21:14,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995371651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:21:14,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369667724] [2021-11-12 23:21:14,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:21:14,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:14,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:21:14,848 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:21:14,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-12 23:21:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:14,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-12 23:21:14,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3526 proven. 1722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:21:17,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3526 proven. 1722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:21:18,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369667724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:21:18,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [233189167] [2021-11-12 23:21:18,496 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:21:18,496 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:21:18,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:21:18,496 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:21:18,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:21:18,498 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,498 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:18,499 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,500 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:21:18,500 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:18,500 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,500 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:21:18,501 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:21:18,504 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_59|], 10=[|v_#valid_60|]} [2021-11-12 23:21:18,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:18,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:21:18,514 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,514 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:18,514 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,515 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:18,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:18,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:18,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:18,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:18,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:21:18,525 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:18,526 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:18,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:18,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,528 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:18,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:21:18,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:21:18,532 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:21:18,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:18,535 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,536 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:18,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:18,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:21:18,540 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:21:18,542 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:21:18,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,553 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:21:18,555 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:21:18,558 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:21:18,559 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:18,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:21:18,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:21:18,563 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:21:18,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:21:18,579 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:18,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:21:18,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,606 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:21:18,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:21:18,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:18,640 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:18,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:18,649 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:18,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:18,653 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:21:19,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:21:19,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:21:19,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 131 [2021-11-12 23:21:19,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749189961] [2021-11-12 23:21:19,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:21:19,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-12 23:21:19,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:21:19,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-12 23:21:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3943, Invalid=15517, Unknown=0, NotChecked=0, Total=19460 [2021-11-12 23:21:19,879 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand has 131 states, 131 states have (on average 3.3282442748091605) internal successors, (436), 131 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:21,773 INFO L93 Difference]: Finished difference Result 562 states and 607 transitions. [2021-11-12 23:21:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-12 23:21:21,773 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.3282442748091605) internal successors, (436), 131 states have internal predecessors, (436), 0 states have call successors, (0), 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 260 [2021-11-12 23:21:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:21,774 INFO L225 Difference]: With dead ends: 562 [2021-11-12 23:21:21,775 INFO L226 Difference]: Without dead ends: 389 [2021-11-12 23:21:21,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 727 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8100 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=7557, Invalid=25385, Unknown=0, NotChecked=0, Total=32942 [2021-11-12 23:21:21,776 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 390 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 472.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.89ms SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 593.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:21,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1095 Invalid, 1490 Unknown, 0 Unchecked, 4.89ms Time], IncrementalHoareTripleChecker [351 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 593.61ms Time] [2021-11-12 23:21:21,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-12 23:21:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 263. [2021-11-12 23:21:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0114503816793894) internal successors, (265), 262 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2021-11-12 23:21:21,808 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 260 [2021-11-12 23:21:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:21,809 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2021-11-12 23:21:21,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.3282442748091605) internal successors, (436), 131 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2021-11-12 23:21:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-12 23:21:21,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:21,811 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:21,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-12 23:21:22,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1380 [2021-11-12 23:21:22,035 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:22,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1811877792, now seen corresponding path program 53 times [2021-11-12 23:21:22,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:21:22,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629540460] [2021-11-12 23:21:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:22,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:21:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3405 proven. 1929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:24,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:21:24,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629540460] [2021-11-12 23:21:24,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629540460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:21:24,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433083383] [2021-11-12 23:21:24,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:21:24,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:24,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:21:24,079 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:21:24,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-12 23:21:24,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2021-11-12 23:21:24,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:21:24,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-12 23:21:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 1806 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:26,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 1806 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:27,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433083383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:21:27,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [822415460] [2021-11-12 23:21:27,457 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:21:27,457 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:21:27,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:21:27,457 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:21:27,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:21:27,460 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,460 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:27,460 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,461 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:21:27,461 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:27,461 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,461 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:21:27,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:21:27,465 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_60|], 10=[|v_#valid_61|]} [2021-11-12 23:21:27,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:27,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:21:27,471 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,471 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:27,471 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:27,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:27,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:27,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:27,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:27,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:27,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:21:27,481 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:27,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:27,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:27,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,485 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,485 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:27,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:21:27,486 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:21:27,489 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:21:27,490 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:27,492 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,496 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:27,497 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,498 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:27,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:21:27,500 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:21:27,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:21:27,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,512 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:21:27,514 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:21:27,516 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:21:27,517 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:27,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:21:27,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:21:27,520 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:21:27,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:21:27,536 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:27,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:21:27,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,557 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:21:27,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:21:27,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:27,569 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:27,570 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:27,575 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:27,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:27,578 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:21:28,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:21:28,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:21:28,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 45, 45] total 132 [2021-11-12 23:21:28,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430041626] [2021-11-12 23:21:28,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:21:28,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-12 23:21:28,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:21:28,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-12 23:21:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3047, Invalid=16693, Unknown=0, NotChecked=0, Total=19740 [2021-11-12 23:21:28,810 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand has 132 states, 132 states have (on average 3.962121212121212) internal successors, (523), 132 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:34,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:34,736 INFO L93 Difference]: Finished difference Result 576 states and 623 transitions. [2021-11-12 23:21:34,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-11-12 23:21:34,737 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.962121212121212) internal successors, (523), 132 states have internal predecessors, (523), 0 states have call successors, (0), 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 262 [2021-11-12 23:21:34,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:34,739 INFO L225 Difference]: With dead ends: 576 [2021-11-12 23:21:34,739 INFO L226 Difference]: Without dead ends: 401 [2021-11-12 23:21:34,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 775 SyntacticMatches, 1 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33778 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=14832, Invalid=82824, Unknown=0, NotChecked=0, Total=97656 [2021-11-12 23:21:34,745 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 742 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 2786 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1106.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 3466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.00ms SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 2786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1327.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:34,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 677 Invalid, 3466 Unknown, 0 Unchecked, 9.00ms Time], IncrementalHoareTripleChecker [680 Valid, 2786 Invalid, 0 Unknown, 0 Unchecked, 1327.83ms Time] [2021-11-12 23:21:34,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-12 23:21:34,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 269. [2021-11-12 23:21:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.0111940298507462) internal successors, (271), 268 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:34,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 271 transitions. [2021-11-12 23:21:34,792 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 271 transitions. Word has length 262 [2021-11-12 23:21:34,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:34,792 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 271 transitions. [2021-11-12 23:21:34,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.962121212121212) internal successors, (523), 132 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 271 transitions. [2021-11-12 23:21:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-12 23:21:34,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:34,795 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:34,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:35,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:35,007 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:35,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1043592072, now seen corresponding path program 54 times [2021-11-12 23:21:35,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:21:35,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442114325] [2021-11-12 23:21:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:35,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:21:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3572 proven. 2018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:37,587 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:21:37,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442114325] [2021-11-12 23:21:37,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442114325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:21:37,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145036917] [2021-11-12 23:21:37,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:21:37,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:37,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:21:37,589 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:21:37,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-12 23:21:37,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:21:37,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:21:37,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-12 23:21:37,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3698 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:41,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3698 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:42,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145036917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:21:42,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604104084] [2021-11-12 23:21:42,069 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:21:42,069 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:21:42,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:21:42,069 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:21:42,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:21:42,080 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,081 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:42,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,081 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:21:42,082 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:42,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,082 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:21:42,083 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:21:42,086 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_61|], 10=[|v_#valid_62|]} [2021-11-12 23:21:42,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:42,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:21:42,091 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,092 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:42,092 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,092 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:42,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:42,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:42,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:42,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:42,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:42,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:21:42,129 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:42,131 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,132 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:42,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:42,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,136 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,137 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:42,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:21:42,138 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:21:42,144 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:21:42,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:42,149 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,151 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:42,152 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:42,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:21:42,158 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:21:42,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:21:42,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,181 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:21:42,183 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:21:42,188 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:21:42,190 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:42,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,192 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:21:42,193 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:21:42,195 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:21:42,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,216 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:21:42,221 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:42,224 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:21:42,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,251 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:21:42,253 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:21:42,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:42,270 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:42,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:42,279 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:42,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:42,283 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:21:43,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:21:43,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:21:43,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 136 [2021-11-12 23:21:43,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125427795] [2021-11-12 23:21:43,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:21:43,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-11-12 23:21:43,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:21:43,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-11-12 23:21:43,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4259, Invalid=16621, Unknown=0, NotChecked=0, Total=20880 [2021-11-12 23:21:43,776 INFO L87 Difference]: Start difference. First operand 269 states and 271 transitions. Second operand has 136 states, 136 states have (on average 3.2941176470588234) internal successors, (448), 136 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:46,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:46,006 INFO L93 Difference]: Finished difference Result 582 states and 629 transitions. [2021-11-12 23:21:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-12 23:21:46,006 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.2941176470588234) internal successors, (448), 136 states have internal predecessors, (448), 0 states have call successors, (0), 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 268 [2021-11-12 23:21:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:46,007 INFO L225 Difference]: With dead ends: 582 [2021-11-12 23:21:46,008 INFO L226 Difference]: Without dead ends: 403 [2021-11-12 23:21:46,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 749 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8652 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=8221, Invalid=27311, Unknown=0, NotChecked=0, Total=35532 [2021-11-12 23:21:46,010 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 367 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 500.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.25ms SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 634.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:46,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 1060 Invalid, 1398 Unknown, 0 Unchecked, 5.25ms Time], IncrementalHoareTripleChecker [300 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 634.16ms Time] [2021-11-12 23:21:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-12 23:21:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 271. [2021-11-12 23:21:46,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.011111111111111) internal successors, (273), 270 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2021-11-12 23:21:46,032 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 268 [2021-11-12 23:21:46,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:46,032 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2021-11-12 23:21:46,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.2941176470588234) internal successors, (448), 136 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2021-11-12 23:21:46,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-12 23:21:46,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:46,034 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:46,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:46,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1434,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:46,247 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:46,248 INFO L85 PathProgramCache]: Analyzing trace with hash -751406499, now seen corresponding path program 55 times [2021-11-12 23:21:46,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:21:46,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752978050] [2021-11-12 23:21:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:46,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:21:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5678 backedges. 1892 proven. 3786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:47,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:21:47,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752978050] [2021-11-12 23:21:47,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752978050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:21:47,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096767633] [2021-11-12 23:21:47,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:21:47,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:47,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:21:47,489 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:21:47,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-12 23:21:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:47,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-12 23:21:47,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5678 backedges. 1980 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:48,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5678 backedges. 1980 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:49,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096767633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:21:49,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [347081870] [2021-11-12 23:21:49,060 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:21:49,060 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:21:49,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:21:49,060 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:21:49,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:21:49,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,063 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:49,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:21:49,063 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:49,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:21:49,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:21:49,066 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_62|], 10=[|v_#valid_63|]} [2021-11-12 23:21:49,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:49,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:21:49,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:49,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:49,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:49,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:49,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:49,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:49,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:21:49,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,083 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:49,083 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,083 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:49,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:49,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,086 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,087 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:49,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:21:49,087 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:21:49,091 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:21:49,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:49,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,105 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:49,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:49,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:21:49,109 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:21:49,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:21:49,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,123 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:21:49,126 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:21:49,129 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:21:49,130 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:49,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,132 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:21:49,132 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:21:49,134 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,137 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:21:49,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,150 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:21:49,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:49,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:21:49,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,188 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:21:49,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:21:49,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:49,207 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:49,209 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:49,216 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:49,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:49,221 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:21:50,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:21:50,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:21:50,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 50 [2021-11-12 23:21:50,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750271127] [2021-11-12 23:21:50,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:21:50,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-12 23:21:50,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:21:50,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-12 23:21:50,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1183, Invalid=2357, Unknown=0, NotChecked=0, Total=3540 [2021-11-12 23:21:50,107 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand has 51 states, 51 states have (on average 5.705882352941177) internal successors, (291), 50 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:51,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:51,177 INFO L93 Difference]: Finished difference Result 288 states and 291 transitions. [2021-11-12 23:21:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-12 23:21:51,178 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.705882352941177) internal successors, (291), 50 states have internal predecessors, (291), 0 states have call successors, (0), 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 270 [2021-11-12 23:21:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:51,179 INFO L225 Difference]: With dead ends: 288 [2021-11-12 23:21:51,179 INFO L226 Difference]: Without dead ends: 286 [2021-11-12 23:21:51,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 839 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3144 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3538, Invalid=7804, Unknown=0, NotChecked=0, Total=11342 [2021-11-12 23:21:51,180 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 331 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 248.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.38ms SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 299.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:51,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 368 Invalid, 665 Unknown, 0 Unchecked, 2.38ms Time], IncrementalHoareTripleChecker [230 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 299.43ms Time] [2021-11-12 23:21:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-12 23:21:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 279. [2021-11-12 23:21:51,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0107913669064748) internal successors, (281), 278 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 281 transitions. [2021-11-12 23:21:51,202 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 281 transitions. Word has length 270 [2021-11-12 23:21:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:51,202 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 281 transitions. [2021-11-12 23:21:51,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.705882352941177) internal successors, (291), 50 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:51,202 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 281 transitions. [2021-11-12 23:21:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-12 23:21:51,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:51,204 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:51,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:51,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1461,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:51,419 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:51,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1028462403, now seen corresponding path program 56 times [2021-11-12 23:21:51,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:21:51,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711333911] [2021-11-12 23:21:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:51,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:21:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 3918 proven. 2112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:54,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:21:54,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711333911] [2021-11-12 23:21:54,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711333911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:21:54,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604503354] [2021-11-12 23:21:54,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:21:54,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:54,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:21:54,204 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:21:54,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-12 23:21:54,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-11-12 23:21:54,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:21:54,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-12 23:21:54,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 4050 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:58,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 4050 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:59,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604503354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:21:59,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1541011992] [2021-11-12 23:21:59,371 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:21:59,371 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:21:59,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:21:59,372 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:21:59,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:21:59,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,377 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:59,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:21:59,378 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:59,378 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,379 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:21:59,379 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:21:59,381 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_63|], 10=[|v_#valid_64|]} [2021-11-12 23:21:59,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:59,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:21:59,387 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,387 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:59,387 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,387 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:59,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:59,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:59,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:59,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:59,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:59,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:21:59,412 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,414 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:59,414 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,415 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:21:59,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:21:59,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,419 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,420 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:59,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:21:59,421 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:21:59,427 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:21:59,429 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:21:59,432 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,434 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:59,435 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,437 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:21:59,438 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:21:59,441 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:21:59,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:21:59,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,463 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:21:59,466 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:21:59,471 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:21:59,473 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:21:59,473 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,475 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:21:59,476 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:21:59,478 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,481 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:21:59,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,499 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:21:59,505 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:21:59,508 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:21:59,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,536 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:21:59,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:21:59,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:21:59,555 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:59,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:59,565 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:21:59,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:21:59,570 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:22:01,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:22:01,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:22:01,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 143 [2021-11-12 23:22:01,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873479773] [2021-11-12 23:22:01,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:22:01,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2021-11-12 23:22:01,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:22:01,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-11-12 23:22:01,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4730, Invalid=18222, Unknown=0, NotChecked=0, Total=22952 [2021-11-12 23:22:01,121 INFO L87 Difference]: Start difference. First operand 279 states and 281 transitions. Second operand has 143 states, 143 states have (on average 3.3216783216783217) internal successors, (475), 143 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:05,300 INFO L93 Difference]: Finished difference Result 787 states and 837 transitions. [2021-11-12 23:22:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-12 23:22:05,300 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 3.3216783216783217) internal successors, (475), 143 states have internal predecessors, (475), 0 states have call successors, (0), 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 278 [2021-11-12 23:22:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:05,302 INFO L225 Difference]: With dead ends: 787 [2021-11-12 23:22:05,302 INFO L226 Difference]: Without dead ends: 421 [2021-11-12 23:22:05,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 775 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15084 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=13331, Invalid=45475, Unknown=0, NotChecked=0, Total=58806 [2021-11-12 23:22:05,307 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 668 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 729.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 1895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.22ms SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 885.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:05,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 1348 Invalid, 1895 Unknown, 0 Unchecked, 8.22ms Time], IncrementalHoareTripleChecker [481 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 885.24ms Time] [2021-11-12 23:22:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-12 23:22:05,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 283. [2021-11-12 23:22:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.0106382978723405) internal successors, (285), 282 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 285 transitions. [2021-11-12 23:22:05,390 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 285 transitions. Word has length 278 [2021-11-12 23:22:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:05,391 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 285 transitions. [2021-11-12 23:22:05,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 3.3216783216783217) internal successors, (475), 143 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 285 transitions. [2021-11-12 23:22:05,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-12 23:22:05,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:05,394 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:05,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:05,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1488 [2021-11-12 23:22:05,611 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash -863970995, now seen corresponding path program 57 times [2021-11-12 23:22:05,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:22:05,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876179161] [2021-11-12 23:22:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:05,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:22:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2070 proven. 4142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:06,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:22:06,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876179161] [2021-11-12 23:22:06,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876179161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:22:06,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620445388] [2021-11-12 23:22:06,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:22:06,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:06,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:06,689 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:22:06,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-12 23:22:06,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:22:06,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:22:06,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-12 23:22:06,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2162 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:07,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2162 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:08,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620445388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:22:08,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [59803542] [2021-11-12 23:22:08,186 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:22:08,186 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:22:08,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:22:08,187 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:22:08,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:22:08,189 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,189 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:08,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:22:08,190 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:08,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:22:08,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:22:08,193 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_64|], 10=[|v_#valid_65|]} [2021-11-12 23:22:08,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:08,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:22:08,199 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:08,200 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:08,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:08,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:08,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:08,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:08,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:08,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:22:08,213 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:22:08,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:22:08,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:08,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,217 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:22:08,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:22:08,218 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:22:08,222 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:22:08,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:22:08,226 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,227 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:08,228 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,229 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:08,229 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:22:08,232 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:22:08,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:22:08,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,246 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:22:08,248 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:22:08,252 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:22:08,253 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:08,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:22:08,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:22:08,257 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,258 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:22:08,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,271 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:22:08,274 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:08,276 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:22:08,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,294 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:22:08,296 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:22:08,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:08,353 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:22:08,355 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:22:08,360 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:22:08,362 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:22:08,363 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:22:09,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:22:09,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:22:09,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 52 [2021-11-12 23:22:09,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040814095] [2021-11-12 23:22:09,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:22:09,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-12 23:22:09,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:22:09,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-12 23:22:09,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=2502, Unknown=0, NotChecked=0, Total=3782 [2021-11-12 23:22:09,264 INFO L87 Difference]: Start difference. First operand 283 states and 285 transitions. Second operand has 53 states, 53 states have (on average 5.716981132075472) internal successors, (303), 52 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:10,423 INFO L93 Difference]: Finished difference Result 300 states and 303 transitions. [2021-11-12 23:22:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-12 23:22:10,423 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.716981132075472) internal successors, (303), 52 states have internal predecessors, (303), 0 states have call successors, (0), 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 282 [2021-11-12 23:22:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:10,425 INFO L225 Difference]: With dead ends: 300 [2021-11-12 23:22:10,425 INFO L226 Difference]: Without dead ends: 298 [2021-11-12 23:22:10,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 877 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3376 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3833, Invalid=8377, Unknown=0, NotChecked=0, Total=12210 [2021-11-12 23:22:10,426 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 300 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 245.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.37ms SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 296.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:10,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 370 Invalid, 637 Unknown, 0 Unchecked, 2.37ms Time], IncrementalHoareTripleChecker [194 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 296.14ms Time] [2021-11-12 23:22:10,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-12 23:22:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 291. [2021-11-12 23:22:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 293 transitions. [2021-11-12 23:22:10,456 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 293 transitions. Word has length 282 [2021-11-12 23:22:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:10,456 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 293 transitions. [2021-11-12 23:22:10,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.716981132075472) internal successors, (303), 52 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 293 transitions. [2021-11-12 23:22:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-12 23:22:10,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:10,458 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:10,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:10,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1515 [2021-11-12 23:22:10,659 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:10,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:10,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1862693325, now seen corresponding path program 58 times [2021-11-12 23:22:10,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:22:10,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067592222] [2021-11-12 23:22:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:10,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:22:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4280 proven. 2300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:13,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:22:13,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067592222] [2021-11-12 23:22:13,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067592222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:22:13,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278781445] [2021-11-12 23:22:13,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:22:13,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:13,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:13,534 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:22:13,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-12 23:22:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:13,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-12 23:22:13,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4416 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:22:18,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4416 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:22:18,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278781445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:22:18,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448979013] [2021-11-12 23:22:18,739 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:22:18,739 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:22:18,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:22:18,739 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:22:18,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:22:18,741 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,742 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:18,742 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:22:18,742 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:18,743 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,743 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:22:18,744 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:22:18,745 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_65|], 10=[|v_#valid_66|]} [2021-11-12 23:22:18,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:18,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:22:18,751 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,751 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:18,751 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:18,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:18,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:18,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:18,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:18,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:18,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:22:18,762 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,763 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:22:18,763 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,764 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:22:18,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:18,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,766 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,767 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:22:18,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:22:18,767 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:22:18,771 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:22:18,772 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:22:18,775 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,776 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:18,776 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:18,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:22:18,780 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:22:18,783 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:22:18,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,794 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:22:18,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:22:18,800 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:22:18,801 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:18,801 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,803 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:22:18,803 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:22:18,805 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:22:18,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:22:18,823 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:18,825 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:22:18,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,842 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:22:18,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:22:18,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:18,855 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:22:18,857 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:22:18,862 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:22:18,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:22:18,865 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:22:20,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:22:20,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:22:20,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 146 [2021-11-12 23:22:20,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355575367] [2021-11-12 23:22:20,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:22:20,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-11-12 23:22:20,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:22:20,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-11-12 23:22:20,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4878, Invalid=18992, Unknown=0, NotChecked=0, Total=23870 [2021-11-12 23:22:20,241 INFO L87 Difference]: Start difference. First operand 291 states and 293 transitions. Second operand has 146 states, 146 states have (on average 3.328767123287671) internal successors, (486), 146 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:22,888 INFO L93 Difference]: Finished difference Result 627 states and 677 transitions. [2021-11-12 23:22:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-12 23:22:22,889 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.328767123287671) internal successors, (486), 146 states have internal predecessors, (486), 0 states have call successors, (0), 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 290 [2021-11-12 23:22:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:22,891 INFO L225 Difference]: With dead ends: 627 [2021-11-12 23:22:22,891 INFO L226 Difference]: Without dead ends: 434 [2021-11-12 23:22:22,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 812 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9885 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=9392, Invalid=31210, Unknown=0, NotChecked=0, Total=40602 [2021-11-12 23:22:22,894 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 422 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 588.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.89ms SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 726.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:22,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 1186 Invalid, 1620 Unknown, 0 Unchecked, 5.89ms Time], IncrementalHoareTripleChecker [384 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 726.11ms Time] [2021-11-12 23:22:22,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-11-12 23:22:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 293. [2021-11-12 23:22:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0102739726027397) internal successors, (295), 292 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 295 transitions. [2021-11-12 23:22:22,925 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 295 transitions. Word has length 290 [2021-11-12 23:22:22,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:22,925 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 295 transitions. [2021-11-12 23:22:22,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.328767123287671) internal successors, (486), 146 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:22,925 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 295 transitions. [2021-11-12 23:22:22,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-12 23:22:22,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:22,927 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:22,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:23,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1542 [2021-11-12 23:22:23,127 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:23,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:23,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1186482776, now seen corresponding path program 59 times [2021-11-12 23:22:23,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:22:23,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050710601] [2021-11-12 23:22:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:23,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:22:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 4280 proven. 2394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:26,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:22:26,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050710601] [2021-11-12 23:22:26,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050710601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:22:26,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15858236] [2021-11-12 23:22:26,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:22:26,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:26,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:26,021 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:22:26,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-12 23:22:26,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-11-12 23:22:26,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:22:26,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-12 23:22:26,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 4418 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:30,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 4418 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:31,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15858236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:22:31,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1001051783] [2021-11-12 23:22:31,559 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:22:31,559 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:22:31,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:22:31,559 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:22:31,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:22:31,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,561 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:31,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:22:31,562 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:31,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:22:31,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:22:31,565 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_66|], 10=[|v_#valid_67|]} [2021-11-12 23:22:31,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:31,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:22:31,569 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,570 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:31,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,570 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:31,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:31,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:31,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:31,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:31,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:31,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:22:31,578 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:22:31,579 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:22:31,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:31,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:22:31,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:22:31,583 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:22:31,586 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:22:31,587 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:22:31,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,615 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:31,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:31,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:22:31,620 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:22:31,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:22:31,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,635 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:22:31,637 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:22:31,641 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:22:31,641 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:31,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,643 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:22:31,643 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:22:31,645 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:22:31,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,655 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:22:31,658 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:31,660 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:22:31,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,674 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:22:31,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:22:31,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:31,684 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:22:31,686 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:22:31,690 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:22:31,691 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:22:31,693 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:22:33,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:22:33,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:22:33,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 148 [2021-11-12 23:22:33,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436643002] [2021-11-12 23:22:33,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:22:33,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2021-11-12 23:22:33,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:22:33,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-11-12 23:22:33,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5027, Invalid=19465, Unknown=0, NotChecked=0, Total=24492 [2021-11-12 23:22:33,162 INFO L87 Difference]: Start difference. First operand 293 states and 295 transitions. Second operand has 148 states, 148 states have (on average 3.2972972972972974) internal successors, (488), 148 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:35,898 INFO L93 Difference]: Finished difference Result 634 states and 685 transitions. [2021-11-12 23:22:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-12 23:22:35,898 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 3.2972972972972974) internal successors, (488), 148 states have internal predecessors, (488), 0 states have call successors, (0), 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 292 [2021-11-12 23:22:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:35,900 INFO L225 Difference]: With dead ends: 634 [2021-11-12 23:22:35,900 INFO L226 Difference]: Without dead ends: 439 [2021-11-12 23:22:35,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 817 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10110 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=9733, Invalid=32087, Unknown=0, NotChecked=0, Total=41820 [2021-11-12 23:22:35,904 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 537 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 580.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.94ms SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 723.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:35,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 1096 Invalid, 1546 Unknown, 0 Unchecked, 5.94ms Time], IncrementalHoareTripleChecker [395 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 723.40ms Time] [2021-11-12 23:22:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-12 23:22:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 295. [2021-11-12 23:22:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 297 transitions. [2021-11-12 23:22:35,948 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 297 transitions. Word has length 292 [2021-11-12 23:22:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:35,949 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 297 transitions. [2021-11-12 23:22:35,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 3.2972972972972974) internal successors, (488), 148 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 297 transitions. [2021-11-12 23:22:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-12 23:22:35,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:35,951 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:35,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:36,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1569,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:36,167 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:36,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2017947331, now seen corresponding path program 60 times [2021-11-12 23:22:36,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:22:36,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030937617] [2021-11-12 23:22:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:36,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:22:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6770 backedges. 2256 proven. 4514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:37,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:22:37,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030937617] [2021-11-12 23:22:37,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030937617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:22:37,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534859285] [2021-11-12 23:22:37,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:22:37,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:37,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:37,507 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:22:37,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-12 23:22:37,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:22:37,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:22:37,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-12 23:22:37,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6770 backedges. 2352 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:38,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6770 backedges. 2352 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:39,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534859285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:22:39,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1041708937] [2021-11-12 23:22:39,038 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:22:39,038 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:22:39,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:22:39,039 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:22:39,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:22:39,042 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,042 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:39,042 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:22:39,043 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:39,043 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,044 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:22:39,044 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:22:39,046 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_67|], 10=[|v_#valid_68|]} [2021-11-12 23:22:39,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:39,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:22:39,052 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,052 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:39,052 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:39,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:39,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:39,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:39,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:39,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:39,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:22:39,065 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:22:39,067 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:22:39,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:39,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,070 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:22:39,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:22:39,071 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:22:39,075 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:22:39,076 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:22:39,078 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,080 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:39,080 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,082 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:39,082 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:22:39,084 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:22:39,087 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:22:39,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,099 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:22:39,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:22:39,105 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:22:39,106 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:39,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:22:39,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:22:39,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,112 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:22:39,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:22:39,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:39,132 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:22:39,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,151 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:22:39,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:22:39,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:39,179 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:22:39,181 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:22:39,189 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:22:39,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:22:39,192 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:22:40,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:22:40,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:22:40,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 54 [2021-11-12 23:22:40,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974312815] [2021-11-12 23:22:40,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:22:40,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-12 23:22:40,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:22:40,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-12 23:22:40,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1381, Invalid=2651, Unknown=0, NotChecked=0, Total=4032 [2021-11-12 23:22:40,014 INFO L87 Difference]: Start difference. First operand 295 states and 297 transitions. Second operand has 55 states, 55 states have (on average 5.7272727272727275) internal successors, (315), 54 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:41,359 INFO L93 Difference]: Finished difference Result 312 states and 315 transitions. [2021-11-12 23:22:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-12 23:22:41,360 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 5.7272727272727275) internal successors, (315), 54 states have internal predecessors, (315), 0 states have call successors, (0), 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 294 [2021-11-12 23:22:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:41,361 INFO L225 Difference]: With dead ends: 312 [2021-11-12 23:22:41,362 INFO L226 Difference]: Without dead ends: 310 [2021-11-12 23:22:41,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 915 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4140, Invalid=8970, Unknown=0, NotChecked=0, Total=13110 [2021-11-12 23:22:41,363 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 212 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 285.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.67ms SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 356.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:41,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 452 Invalid, 674 Unknown, 0 Unchecked, 2.67ms Time], IncrementalHoareTripleChecker [153 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 356.35ms Time] [2021-11-12 23:22:41,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-12 23:22:41,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 303. [2021-11-12 23:22:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.009933774834437) internal successors, (305), 302 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 305 transitions. [2021-11-12 23:22:41,416 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 305 transitions. Word has length 294 [2021-11-12 23:22:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:41,417 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 305 transitions. [2021-11-12 23:22:41,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 5.7272727272727275) internal successors, (315), 54 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 305 transitions. [2021-11-12 23:22:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-12 23:22:41,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:41,418 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 48, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:41,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:41,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1596 [2021-11-12 23:22:41,619 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:41,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash 280122915, now seen corresponding path program 61 times [2021-11-12 23:22:41,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:22:41,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62703187] [2021-11-12 23:22:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:41,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:22:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 4658 proven. 2496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:44,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:22:44,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62703187] [2021-11-12 23:22:44,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62703187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:22:44,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615640412] [2021-11-12 23:22:44,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:22:44,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:44,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:44,968 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:22:44,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-12 23:22:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:45,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-12 23:22:45,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 4800 proven. 2352 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:22:49,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 4800 proven. 2352 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:22:50,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615640412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:22:50,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193578113] [2021-11-12 23:22:50,539 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:22:50,539 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:22:50,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:22:50,540 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:22:50,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:22:50,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,543 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:50,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:22:50,544 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:50,544 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:22:50,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:22:50,547 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_68|], 10=[|v_#valid_69|]} [2021-11-12 23:22:50,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:50,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:22:50,552 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:50,553 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:50,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:50,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:50,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:50,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:50,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:22:50,563 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:22:50,565 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:22:50,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:22:50,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,568 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:22:50,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:22:50,569 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:22:50,572 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:22:50,574 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:22:50,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,577 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:50,578 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:22:50,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:22:50,582 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:22:50,584 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:22:50,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,596 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:22:50,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:22:50,601 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:22:50,602 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:22:50,603 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:22:50,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:22:50,606 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:22:50,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:22:50,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:50,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:22:50,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,647 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:22:50,649 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:22:50,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:22:50,660 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:22:50,662 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:22:50,667 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:22:50,669 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:22:50,670 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:22:52,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:22:52,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:22:52,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 152 [2021-11-12 23:22:52,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131804441] [2021-11-12 23:22:52,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:22:52,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2021-11-12 23:22:52,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:22:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-11-12 23:22:52,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5280, Invalid=20480, Unknown=0, NotChecked=0, Total=25760 [2021-11-12 23:22:52,105 INFO L87 Difference]: Start difference. First operand 303 states and 305 transitions. Second operand has 152 states, 152 states have (on average 3.3289473684210527) internal successors, (506), 152 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:55,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:55,080 INFO L93 Difference]: Finished difference Result 653 states and 705 transitions. [2021-11-12 23:22:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-12 23:22:55,080 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 3.3289473684210527) internal successors, (506), 152 states have internal predecessors, (506), 0 states have call successors, (0), 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 302 [2021-11-12 23:22:55,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:55,083 INFO L225 Difference]: With dead ends: 653 [2021-11-12 23:22:55,083 INFO L226 Difference]: Without dead ends: 452 [2021-11-12 23:22:55,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1054 GetRequests, 846 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10648 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=10182, Invalid=33708, Unknown=0, NotChecked=0, Total=43890 [2021-11-12 23:22:55,087 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 525 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 626.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.62ms SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 803.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:55,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 1235 Invalid, 1678 Unknown, 0 Unchecked, 6.62ms Time], IncrementalHoareTripleChecker [393 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 803.03ms Time] [2021-11-12 23:22:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-12 23:22:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 305. [2021-11-12 23:22:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.0098684210526316) internal successors, (307), 304 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 307 transitions. [2021-11-12 23:22:55,122 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 307 transitions. Word has length 302 [2021-11-12 23:22:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:55,122 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 307 transitions. [2021-11-12 23:22:55,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 3.3289473684210527) internal successors, (506), 152 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 307 transitions. [2021-11-12 23:22:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-12 23:22:55,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:55,125 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:55,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:55,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1623,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:55,327 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:55,327 INFO L85 PathProgramCache]: Analyzing trace with hash -886635832, now seen corresponding path program 62 times [2021-11-12 23:22:55,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:22:55,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905183332] [2021-11-12 23:22:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:55,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:22:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7252 backedges. 4658 proven. 2594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:58,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:22:58,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905183332] [2021-11-12 23:22:58,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905183332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:22:58,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591864920] [2021-11-12 23:22:58,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:22:58,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:58,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:58,579 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:22:58,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-12 23:22:58,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2021-11-12 23:22:58,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:22:58,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-12 23:22:58,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7252 backedges. 4802 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:03,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7252 backedges. 4802 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:04,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591864920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:04,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [392867925] [2021-11-12 23:23:04,418 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:23:04,418 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:23:04,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:23:04,418 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:23:04,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:23:04,421 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,421 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:04,421 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,422 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:23:04,422 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:04,422 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,423 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:23:04,423 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:04,425 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_69|], 10=[|v_#valid_70|]} [2021-11-12 23:23:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:04,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:23:04,430 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:04,431 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:04,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:04,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:04,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:04,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:04,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:04,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:23:04,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:04,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:04,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:04,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:23:04,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:23:04,447 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:23:04,451 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:23:04,452 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:23:04,454 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,456 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:04,456 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,457 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:04,458 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:23:04,460 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:23:04,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:23:04,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,487 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:23:04,490 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:23:04,496 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:23:04,497 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:04,498 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:23:04,500 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:23:04,503 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:23:04,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:23:04,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:04,531 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:23:04,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,549 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:23:04,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:23:04,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:04,562 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:23:04,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:23:04,569 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:23:04,570 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:23:04,572 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:23:06,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:23:06,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:23:06,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 154 [2021-11-12 23:23:06,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945724908] [2021-11-12 23:23:06,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:06,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2021-11-12 23:23:06,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:06,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-11-12 23:23:06,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5435, Invalid=20971, Unknown=0, NotChecked=0, Total=26406 [2021-11-12 23:23:06,114 INFO L87 Difference]: Start difference. First operand 305 states and 307 transitions. Second operand has 154 states, 154 states have (on average 3.2987012987012987) internal successors, (508), 154 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:09,180 INFO L93 Difference]: Finished difference Result 660 states and 713 transitions. [2021-11-12 23:23:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-12 23:23:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 3.2987012987012987) internal successors, (508), 154 states have internal predecessors, (508), 0 states have call successors, (0), 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 304 [2021-11-12 23:23:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:09,183 INFO L225 Difference]: With dead ends: 660 [2021-11-12 23:23:09,183 INFO L226 Difference]: Without dead ends: 457 [2021-11-12 23:23:09,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 851 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10881 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=10537, Invalid=34619, Unknown=0, NotChecked=0, Total=45156 [2021-11-12 23:23:09,187 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 523 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 663.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.92ms SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 826.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:09,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 1227 Invalid, 1838 Unknown, 0 Unchecked, 6.92ms Time], IncrementalHoareTripleChecker [546 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 826.73ms Time] [2021-11-12 23:23:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-12 23:23:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 307. [2021-11-12 23:23:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.0098039215686274) internal successors, (309), 306 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 309 transitions. [2021-11-12 23:23:09,221 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 309 transitions. Word has length 304 [2021-11-12 23:23:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:09,221 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 309 transitions. [2021-11-12 23:23:09,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 3.2987012987012987) internal successors, (508), 154 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 309 transitions. [2021-11-12 23:23:09,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-12 23:23:09,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:09,223 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:09,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:09,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1650,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:09,424 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1155327443, now seen corresponding path program 63 times [2021-11-12 23:23:09,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:09,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163117715] [2021-11-12 23:23:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:09,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7352 backedges. 2450 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:10,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:10,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163117715] [2021-11-12 23:23:10,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163117715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:10,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477648303] [2021-11-12 23:23:10,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:23:10,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:10,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:10,801 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:10,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-12 23:23:10,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:23:10,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:10,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-12 23:23:10,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7352 backedges. 2550 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:11,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7352 backedges. 2550 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:12,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477648303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:12,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1621359281] [2021-11-12 23:23:12,403 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:23:12,403 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:23:12,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:23:12,404 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:23:12,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:23:12,406 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,406 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:12,407 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:23:12,407 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:12,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:23:12,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:12,410 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_70|], 10=[|v_#valid_71|]} [2021-11-12 23:23:12,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:12,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:23:12,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:12,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,417 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:12,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:12,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:12,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:12,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:12,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:12,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:23:12,432 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,433 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:12,434 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,434 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:12,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:12,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,437 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:23:12,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:23:12,438 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:23:12,441 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:23:12,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:23:12,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,446 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:12,447 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:12,449 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:23:12,451 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:23:12,453 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:23:12,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,465 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:23:12,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:23:12,471 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:23:12,472 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:12,472 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,474 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:23:12,474 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:23:12,476 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:23:12,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,490 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:23:12,494 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:12,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:23:12,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,513 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:23:12,515 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:23:12,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:12,526 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:23:12,527 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:23:12,532 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:23:12,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:23:12,536 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:23:13,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:23:13,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:23:13,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 56 [2021-11-12 23:23:13,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867110088] [2021-11-12 23:23:13,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:13,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-12 23:23:13,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:13,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-12 23:23:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1486, Invalid=2804, Unknown=0, NotChecked=0, Total=4290 [2021-11-12 23:23:13,503 INFO L87 Difference]: Start difference. First operand 307 states and 309 transitions. Second operand has 57 states, 57 states have (on average 5.7368421052631575) internal successors, (327), 56 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:14,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:14,819 INFO L93 Difference]: Finished difference Result 324 states and 327 transitions. [2021-11-12 23:23:14,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-12 23:23:14,819 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 5.7368421052631575) internal successors, (327), 56 states have internal predecessors, (327), 0 states have call successors, (0), 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 306 [2021-11-12 23:23:14,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:14,821 INFO L225 Difference]: With dead ends: 324 [2021-11-12 23:23:14,821 INFO L226 Difference]: Without dead ends: 322 [2021-11-12 23:23:14,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 953 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3864 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4459, Invalid=9583, Unknown=0, NotChecked=0, Total=14042 [2021-11-12 23:23:14,822 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 219 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 272.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.57ms SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 329.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:14,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 449 Invalid, 687 Unknown, 0 Unchecked, 2.57ms Time], IncrementalHoareTripleChecker [159 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 329.12ms Time] [2021-11-12 23:23:14,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-12 23:23:14,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 315. [2021-11-12 23:23:14,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.0095541401273886) internal successors, (317), 314 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 317 transitions. [2021-11-12 23:23:14,861 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 317 transitions. Word has length 306 [2021-11-12 23:23:14,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:14,861 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 317 transitions. [2021-11-12 23:23:14,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 5.7368421052631575) internal successors, (327), 56 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:14,861 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 317 transitions. [2021-11-12 23:23:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-12 23:23:14,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:14,864 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:14,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:15,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1677 [2021-11-12 23:23:15,064 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:15,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:15,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1791168749, now seen corresponding path program 64 times [2021-11-12 23:23:15,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:15,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066698031] [2021-11-12 23:23:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:15,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7752 backedges. 5052 proven. 2700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:18,528 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:18,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066698031] [2021-11-12 23:23:18,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066698031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:18,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639555672] [2021-11-12 23:23:18,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:23:18,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:18,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:18,529 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:18,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-12 23:23:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:18,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-12 23:23:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7752 backedges. 5200 proven. 2550 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:23:23,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7752 backedges. 5200 proven. 2550 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:23:24,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639555672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:24,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1031237976] [2021-11-12 23:23:24,556 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:23:24,556 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:23:24,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:23:24,556 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:23:24,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:23:24,584 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,585 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:24,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,586 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:23:24,586 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:24,587 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,587 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:23:24,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:24,590 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_71|], 10=[|v_#valid_72|]} [2021-11-12 23:23:24,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:24,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:23:24,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:24,599 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:24,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:24,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:24,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:24,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:24,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:24,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:23:24,614 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,615 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:24,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:24,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:24,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:23:24,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:23:24,622 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:23:24,628 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:23:24,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:23:24,633 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,635 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:24,636 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,638 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:24,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:23:24,642 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:23:24,645 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:23:24,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,664 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:23:24,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:23:24,671 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:23:24,673 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:24,674 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:23:24,676 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:23:24,679 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,681 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:23:24,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,700 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:23:24,706 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:24,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:23:24,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,733 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:23:24,735 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:23:24,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:24,754 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:23:24,756 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:23:24,764 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:23:24,766 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:23:24,768 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:23:26,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:23:26,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:23:26,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 158 [2021-11-12 23:23:26,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915566228] [2021-11-12 23:23:26,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:26,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2021-11-12 23:23:26,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:26,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-11-12 23:23:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5698, Invalid=22024, Unknown=0, NotChecked=0, Total=27722 [2021-11-12 23:23:26,250 INFO L87 Difference]: Start difference. First operand 315 states and 317 transitions. Second operand has 158 states, 158 states have (on average 3.329113924050633) internal successors, (526), 158 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:29,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:29,382 INFO L93 Difference]: Finished difference Result 679 states and 733 transitions. [2021-11-12 23:23:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-12 23:23:29,382 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 3.329113924050633) internal successors, (526), 158 states have internal predecessors, (526), 0 states have call successors, (0), 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 314 [2021-11-12 23:23:29,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:29,385 INFO L225 Difference]: With dead ends: 679 [2021-11-12 23:23:29,385 INFO L226 Difference]: Without dead ends: 470 [2021-11-12 23:23:29,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 880 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11439 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=11004, Invalid=36302, Unknown=0, NotChecked=0, Total=47306 [2021-11-12 23:23:29,388 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 532 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 632.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.85ms SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 780.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:29,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 1273 Invalid, 1685 Unknown, 0 Unchecked, 6.85ms Time], IncrementalHoareTripleChecker [348 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 780.26ms Time] [2021-11-12 23:23:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-12 23:23:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 317. [2021-11-12 23:23:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.009493670886076) internal successors, (319), 316 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 319 transitions. [2021-11-12 23:23:29,425 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 319 transitions. Word has length 314 [2021-11-12 23:23:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:29,425 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 319 transitions. [2021-11-12 23:23:29,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 3.329113924050633) internal successors, (526), 158 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 319 transitions. [2021-11-12 23:23:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-12 23:23:29,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:29,427 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:29,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:29,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1704,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:29,627 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:29,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:29,628 INFO L85 PathProgramCache]: Analyzing trace with hash 75680824, now seen corresponding path program 65 times [2021-11-12 23:23:29,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:29,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700276943] [2021-11-12 23:23:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:29,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7854 backedges. 5052 proven. 2802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:33,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:33,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700276943] [2021-11-12 23:23:33,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700276943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:33,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90655419] [2021-11-12 23:23:33,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:23:33,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:33,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:33,087 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:33,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-12 23:23:33,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-11-12 23:23:33,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:33,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-12 23:23:33,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7854 backedges. 5202 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:38,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7854 backedges. 5202 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:39,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90655419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:39,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186266414] [2021-11-12 23:23:39,546 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:23:39,546 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:23:39,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:23:39,547 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:23:39,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:23:39,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,549 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:39,550 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,550 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:23:39,550 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:39,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:23:39,552 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:39,553 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_72|], 10=[|v_#valid_73|]} [2021-11-12 23:23:39,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:39,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:23:39,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,559 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:39,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:39,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:39,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:39,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:39,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:39,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:39,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:23:39,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:39,572 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:39,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:39,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:23:39,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:23:39,576 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:23:39,580 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:23:39,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:23:39,583 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,585 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:39,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,587 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:39,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:23:39,589 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:23:39,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:23:39,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,613 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:23:39,615 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:23:39,619 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:23:39,620 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:39,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:23:39,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:23:39,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:23:39,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,639 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,641 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:23:39,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:39,645 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:23:39,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,663 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:23:39,665 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:23:39,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:39,676 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:23:39,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:23:39,683 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:23:39,685 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:23:39,687 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:23:41,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:23:41,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:23:41,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 160 [2021-11-12 23:23:41,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515918620] [2021-11-12 23:23:41,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:41,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2021-11-12 23:23:41,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2021-11-12 23:23:41,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5859, Invalid=22533, Unknown=0, NotChecked=0, Total=28392 [2021-11-12 23:23:41,139 INFO L87 Difference]: Start difference. First operand 317 states and 319 transitions. Second operand has 160 states, 160 states have (on average 3.3) internal successors, (528), 160 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:44,438 INFO L93 Difference]: Finished difference Result 686 states and 741 transitions. [2021-11-12 23:23:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-12 23:23:44,438 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 3.3) internal successors, (528), 160 states have internal predecessors, (528), 0 states have call successors, (0), 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 316 [2021-11-12 23:23:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:44,441 INFO L225 Difference]: With dead ends: 686 [2021-11-12 23:23:44,441 INFO L226 Difference]: Without dead ends: 475 [2021-11-12 23:23:44,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1104 GetRequests, 885 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11680 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=11373, Invalid=37247, Unknown=0, NotChecked=0, Total=48620 [2021-11-12 23:23:44,447 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 607 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 666.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.06ms SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 835.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:44,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 1223 Invalid, 1825 Unknown, 0 Unchecked, 7.06ms Time], IncrementalHoareTripleChecker [545 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 835.45ms Time] [2021-11-12 23:23:44,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-11-12 23:23:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 319. [2021-11-12 23:23:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.009433962264151) internal successors, (321), 318 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 321 transitions. [2021-11-12 23:23:44,487 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 321 transitions. Word has length 316 [2021-11-12 23:23:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:44,487 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 321 transitions. [2021-11-12 23:23:44,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 3.3) internal successors, (528), 160 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:44,488 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 321 transitions. [2021-11-12 23:23:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-11-12 23:23:44,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:44,489 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 52, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:44,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:44,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1731,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:44,691 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:44,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1178209251, now seen corresponding path program 66 times [2021-11-12 23:23:44,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:44,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007742334] [2021-11-12 23:23:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:44,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7958 backedges. 2652 proven. 5306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:46,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:46,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007742334] [2021-11-12 23:23:46,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007742334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:46,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413368014] [2021-11-12 23:23:46,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:23:46,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:46,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:46,092 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:46,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-12 23:23:46,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:23:46,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:46,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-12 23:23:46,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7958 backedges. 2756 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:47,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7958 backedges. 2756 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:47,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413368014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:23:47,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408608076] [2021-11-12 23:23:47,792 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:23:47,792 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:23:47,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:23:47,792 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:23:47,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:23:47,794 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,795 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:47,795 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:23:47,795 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:47,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:23:47,797 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:23:47,798 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_73|], 10=[|v_#valid_74|]} [2021-11-12 23:23:47,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:47,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:23:47,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,818 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:47,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:47,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:47,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:47,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:47,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:47,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:47,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:23:47,828 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:47,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,830 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:23:47,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:23:47,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:23:47,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:23:47,833 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:23:47,836 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:23:47,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:23:47,840 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,841 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:47,841 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,842 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:23:47,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:23:47,845 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:23:47,847 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:23:47,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,872 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:23:47,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:23:47,880 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:23:47,881 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:23:47,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:23:47,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:23:47,886 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:23:47,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,905 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,907 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:23:47,910 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:23:47,913 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:23:47,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,932 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:23:47,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:23:47,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:23:47,943 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:23:47,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:23:47,956 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:23:47,959 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:23:47,961 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:23:48,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:23:48,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:23:48,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 58 [2021-11-12 23:23:48,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921978429] [2021-11-12 23:23:48,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:23:48,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-12 23:23:48,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:23:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-12 23:23:48,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1595, Invalid=2961, Unknown=0, NotChecked=0, Total=4556 [2021-11-12 23:23:48,935 INFO L87 Difference]: Start difference. First operand 319 states and 321 transitions. Second operand has 59 states, 59 states have (on average 5.745762711864407) internal successors, (339), 58 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:50,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:50,417 INFO L93 Difference]: Finished difference Result 336 states and 339 transitions. [2021-11-12 23:23:50,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-12 23:23:50,417 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 5.745762711864407) internal successors, (339), 58 states have internal predecessors, (339), 0 states have call successors, (0), 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 318 [2021-11-12 23:23:50,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:50,419 INFO L225 Difference]: With dead ends: 336 [2021-11-12 23:23:50,419 INFO L226 Difference]: Without dead ends: 334 [2021-11-12 23:23:50,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 991 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4120 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4790, Invalid=10216, Unknown=0, NotChecked=0, Total=15006 [2021-11-12 23:23:50,423 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 279 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 310.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 374.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:50,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 485 Invalid, 783 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [217 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 374.26ms Time] [2021-11-12 23:23:50,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-12 23:23:50,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 327. [2021-11-12 23:23:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.00920245398773) internal successors, (329), 326 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:50,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 329 transitions. [2021-11-12 23:23:50,481 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 329 transitions. Word has length 318 [2021-11-12 23:23:50,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:50,482 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 329 transitions. [2021-11-12 23:23:50,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 5.745762711864407) internal successors, (339), 58 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:50,482 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 329 transitions. [2021-11-12 23:23:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-12 23:23:50,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:50,485 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 52, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:50,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:50,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1758,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:50,691 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:50,692 INFO L85 PathProgramCache]: Analyzing trace with hash -736175869, now seen corresponding path program 67 times [2021-11-12 23:23:50,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:50,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452619580] [2021-11-12 23:23:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:50,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8374 backedges. 5462 proven. 2912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:54,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:23:54,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452619580] [2021-11-12 23:23:54,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452619580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:54,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118922008] [2021-11-12 23:23:54,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:23:54,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:23:54,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:54,358 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:23:54,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-12 23:23:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:54,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-12 23:23:54,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8374 backedges. 5616 proven. 2756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:23:59,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8374 backedges. 5616 proven. 2756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:24:00,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118922008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:00,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [177529147] [2021-11-12 23:24:00,700 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:24:00,700 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:24:00,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:24:00,700 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:24:00,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:24:00,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,703 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:00,703 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:24:00,704 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:00,704 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:24:00,705 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:24:00,707 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_74|], 10=[|v_#valid_75|]} [2021-11-12 23:24:00,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:00,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:24:00,712 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,713 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:00,713 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:00,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:24:00,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:00,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:00,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:00,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:24:00,746 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:24:00,748 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,749 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:24:00,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:24:00,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,753 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,754 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:24:00,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:24:00,755 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:24:00,761 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:24:00,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:24:00,766 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,768 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:00,769 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,771 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:00,772 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:24:00,775 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:24:00,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:24:00,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,796 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:24:00,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:24:00,804 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:24:00,806 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:00,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:24:00,809 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:24:00,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:24:00,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,834 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:24:00,840 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:00,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:24:00,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,869 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:24:00,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:24:00,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:00,889 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:24:00,891 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:24:00,899 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:24:00,901 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:24:00,903 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:24:02,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:24:02,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:24:02,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 108, 108] total 164 [2021-11-12 23:24:02,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071781658] [2021-11-12 23:24:02,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:24:02,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2021-11-12 23:24:02,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:24:02,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-11-12 23:24:02,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6132, Invalid=23624, Unknown=0, NotChecked=0, Total=29756 [2021-11-12 23:24:02,495 INFO L87 Difference]: Start difference. First operand 327 states and 329 transitions. Second operand has 164 states, 164 states have (on average 3.3292682926829267) internal successors, (546), 164 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:06,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:06,005 INFO L93 Difference]: Finished difference Result 705 states and 761 transitions. [2021-11-12 23:24:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-12 23:24:06,006 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 3.3292682926829267) internal successors, (546), 164 states have internal predecessors, (546), 0 states have call successors, (0), 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 326 [2021-11-12 23:24:06,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:06,008 INFO L225 Difference]: With dead ends: 705 [2021-11-12 23:24:06,008 INFO L226 Difference]: Without dead ends: 488 [2021-11-12 23:24:06,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1138 GetRequests, 914 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12258 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=11858, Invalid=38992, Unknown=0, NotChecked=0, Total=50850 [2021-11-12 23:24:06,012 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 575 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 731.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.34ms SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 925.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:06,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 1214 Invalid, 1915 Unknown, 0 Unchecked, 7.34ms Time], IncrementalHoareTripleChecker [641 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 925.27ms Time] [2021-11-12 23:24:06,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-12 23:24:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 329. [2021-11-12 23:24:06,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.0091463414634145) internal successors, (331), 328 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 331 transitions. [2021-11-12 23:24:06,052 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 331 transitions. Word has length 326 [2021-11-12 23:24:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:06,052 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 331 transitions. [2021-11-12 23:24:06,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 3.3292682926829267) internal successors, (546), 164 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 331 transitions. [2021-11-12 23:24:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-12 23:24:06,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:06,054 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:06,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:06,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1785 [2021-11-12 23:24:06,255 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:06,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:06,255 INFO L85 PathProgramCache]: Analyzing trace with hash 426845864, now seen corresponding path program 68 times [2021-11-12 23:24:06,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:06,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928271546] [2021-11-12 23:24:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:06,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5462 proven. 3018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:10,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:10,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928271546] [2021-11-12 23:24:10,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928271546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:10,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266939546] [2021-11-12 23:24:10,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:24:10,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:10,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:10,021 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:24:10,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-12 23:24:10,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2021-11-12 23:24:10,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-12 23:24:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 2862 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:14,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 2862 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:15,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266939546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:15,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1136061108] [2021-11-12 23:24:15,469 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:24:15,469 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:24:15,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:24:15,469 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:24:15,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:24:15,471 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,472 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:15,472 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:24:15,473 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:15,473 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:24:15,474 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:24:15,475 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_75|], 10=[|v_#valid_76|]} [2021-11-12 23:24:15,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:15,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:24:15,481 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:15,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:15,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:24:15,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:15,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:15,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:15,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:15,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:24:15,493 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,495 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:24:15,495 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,495 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:24:15,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:24:15,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,498 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:24:15,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:24:15,499 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:24:15,503 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:24:15,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:24:15,507 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,508 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:15,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:15,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:24:15,512 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:24:15,515 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:24:15,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,527 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:24:15,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:24:15,533 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:24:15,534 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:15,534 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,536 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:24:15,536 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:24:15,538 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:24:15,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,553 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,554 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:24:15,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:15,559 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:24:15,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,578 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:24:15,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:24:15,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:15,590 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:24:15,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:24:15,597 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:24:15,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:24:15,600 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:24:17,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:24:17,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:24:17,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 56, 56] total 165 [2021-11-12 23:24:17,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467674151] [2021-11-12 23:24:17,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:24:17,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2021-11-12 23:24:17,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:24:17,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2021-11-12 23:24:17,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4708, Invalid=25394, Unknown=0, NotChecked=0, Total=30102 [2021-11-12 23:24:17,133 INFO L87 Difference]: Start difference. First operand 329 states and 331 transitions. Second operand has 165 states, 165 states have (on average 3.9696969696969697) internal successors, (655), 165 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:26,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:26,787 INFO L93 Difference]: Finished difference Result 719 states and 777 transitions. [2021-11-12 23:24:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-11-12 23:24:26,788 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 3.9696969696969697) internal successors, (655), 165 states have internal predecessors, (655), 0 states have call successors, (0), 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 328 [2021-11-12 23:24:26,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:26,791 INFO L225 Difference]: With dead ends: 719 [2021-11-12 23:24:26,791 INFO L226 Difference]: Without dead ends: 500 [2021-11-12 23:24:26,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1362 GetRequests, 973 SyntacticMatches, 1 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52819 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=23071, Invalid=128639, Unknown=0, NotChecked=0, Total=151710 [2021-11-12 23:24:26,800 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 1064 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 3889 mSolverCounterSat, 1025 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1663.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 4914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.59ms SdHoareTripleChecker+Time, 1025 IncrementalHoareTripleChecker+Valid, 3889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2004.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:26,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 886 Invalid, 4914 Unknown, 0 Unchecked, 13.59ms Time], IncrementalHoareTripleChecker [1025 Valid, 3889 Invalid, 0 Unknown, 0 Unchecked, 2004.58ms Time] [2021-11-12 23:24:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-12 23:24:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 335. [2021-11-12 23:24:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.0089820359281436) internal successors, (337), 334 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 337 transitions. [2021-11-12 23:24:26,840 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 337 transitions. Word has length 328 [2021-11-12 23:24:26,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:26,841 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 337 transitions. [2021-11-12 23:24:26,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 3.9696969696969697) internal successors, (655), 165 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:26,841 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 337 transitions. [2021-11-12 23:24:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-12 23:24:26,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:26,843 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:26,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:27,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1812 [2021-11-12 23:24:27,044 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash -89161152, now seen corresponding path program 69 times [2021-11-12 23:24:27,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:27,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498131052] [2021-11-12 23:24:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:27,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8802 backedges. 5673 proven. 3129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:30,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:30,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498131052] [2021-11-12 23:24:30,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498131052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:30,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871915285] [2021-11-12 23:24:30,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:24:30,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:30,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:30,953 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:24:30,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-12 23:24:31,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:24:31,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:31,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-12 23:24:31,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8802 backedges. 2970 proven. 5832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:35,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8802 backedges. 2970 proven. 5832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:36,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871915285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:36,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638981175] [2021-11-12 23:24:36,190 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:24:36,190 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:24:36,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:24:36,191 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:24:36,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:24:36,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,197 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:36,197 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,197 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:24:36,198 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:36,198 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:24:36,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:24:36,202 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_76|], 10=[|v_#valid_77|]} [2021-11-12 23:24:36,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:36,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:24:36,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,208 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:36,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,209 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:36,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:24:36,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:36,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:36,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:36,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:36,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:24:36,219 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:24:36,221 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,221 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:24:36,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:24:36,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,224 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,224 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:24:36,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:24:36,225 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:24:36,228 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:24:36,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:24:36,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,233 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:36,234 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:36,236 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:24:36,238 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:24:36,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:24:36,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,252 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:24:36,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:24:36,258 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:24:36,259 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:36,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:24:36,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:24:36,263 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:24:36,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,277 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:24:36,281 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:36,283 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:24:36,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,316 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:24:36,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:24:36,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:36,335 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:24:36,337 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:24:36,344 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:24:36,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:24:36,348 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:24:37,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:24:37,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:24:37,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 57, 57] total 168 [2021-11-12 23:24:37,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520185687] [2021-11-12 23:24:37,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:24:37,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2021-11-12 23:24:37,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:24:37,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2021-11-12 23:24:37,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4877, Invalid=26275, Unknown=0, NotChecked=0, Total=31152 [2021-11-12 23:24:37,942 INFO L87 Difference]: Start difference. First operand 335 states and 337 transitions. Second operand has 168 states, 168 states have (on average 3.9702380952380953) internal successors, (667), 168 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:47,996 INFO L93 Difference]: Finished difference Result 732 states and 791 transitions. [2021-11-12 23:24:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-11-12 23:24:47,997 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 3.9702380952380953) internal successors, (667), 168 states have internal predecessors, (667), 0 states have call successors, (0), 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 334 [2021-11-12 23:24:47,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:48,000 INFO L225 Difference]: With dead ends: 732 [2021-11-12 23:24:48,000 INFO L226 Difference]: Without dead ends: 509 [2021-11-12 23:24:48,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1387 GetRequests, 991 SyntacticMatches, 1 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54760 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=23910, Invalid=133302, Unknown=0, NotChecked=0, Total=157212 [2021-11-12 23:24:48,009 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1142 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 3461 mSolverCounterSat, 1254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1578.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 4715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.73ms SdHoareTripleChecker+Time, 1254 IncrementalHoareTripleChecker+Valid, 3461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1909.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:48,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1142 Valid, 777 Invalid, 4715 Unknown, 0 Unchecked, 13.73ms Time], IncrementalHoareTripleChecker [1254 Valid, 3461 Invalid, 0 Unknown, 0 Unchecked, 1909.50ms Time] [2021-11-12 23:24:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-12 23:24:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 341. [2021-11-12 23:24:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.0088235294117647) internal successors, (343), 340 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 343 transitions. [2021-11-12 23:24:48,055 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 343 transitions. Word has length 334 [2021-11-12 23:24:48,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:48,055 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 343 transitions. [2021-11-12 23:24:48,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 3.9702380952380953) internal successors, (667), 168 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:48,056 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 343 transitions. [2021-11-12 23:24:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-12 23:24:48,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:48,058 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:48,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-12 23:24:48,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1839,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:48,258 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:48,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:48,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1029149208, now seen corresponding path program 70 times [2021-11-12 23:24:48,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:48,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120151057] [2021-11-12 23:24:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:48,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9130 backedges. 5888 proven. 3242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:52,400 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:52,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120151057] [2021-11-12 23:24:52,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120151057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:52,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163928156] [2021-11-12 23:24:52,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:24:52,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:52,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:52,401 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:24:52,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-12 23:24:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:52,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-12 23:24:52,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9130 backedges. 6050 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:58,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9130 backedges. 6050 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:59,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163928156] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:59,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710919075] [2021-11-12 23:24:59,574 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:24:59,574 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:24:59,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:24:59,574 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:24:59,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:24:59,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,577 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:59,577 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:24:59,578 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:59,578 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:24:59,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:24:59,580 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_77|], 10=[|v_#valid_78|]} [2021-11-12 23:24:59,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:59,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:24:59,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,586 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:59,587 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,587 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:59,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:24:59,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:59,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:59,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:59,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:59,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:24:59,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:24:59,599 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:24:59,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:24:59,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,601 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:24:59,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:24:59,602 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:24:59,606 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:24:59,607 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:24:59,610 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,611 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:59,612 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:59,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:24:59,615 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:24:59,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:24:59,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,629 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:24:59,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:24:59,635 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:24:59,637 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:59,637 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:24:59,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:24:59,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:24:59,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,655 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:24:59,659 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:59,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:24:59,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,678 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:24:59,679 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:24:59,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:59,690 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:24:59,692 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:24:59,697 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:24:59,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:24:59,700 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:25:01,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:25:01,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:25:01,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114, 114] total 172 [2021-11-12 23:25:01,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226246777] [2021-11-12 23:25:01,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:01,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2021-11-12 23:25:01,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:25:01,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2021-11-12 23:25:01,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6755, Invalid=25825, Unknown=0, NotChecked=0, Total=32580 [2021-11-12 23:25:01,347 INFO L87 Difference]: Start difference. First operand 341 states and 343 transitions. Second operand has 172 states, 172 states have (on average 3.302325581395349) internal successors, (568), 172 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:05,233 INFO L93 Difference]: Finished difference Result 738 states and 797 transitions. [2021-11-12 23:25:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-12 23:25:05,233 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 172 states have (on average 3.302325581395349) internal successors, (568), 172 states have internal predecessors, (568), 0 states have call successors, (0), 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 340 [2021-11-12 23:25:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:05,235 INFO L225 Difference]: With dead ends: 738 [2021-11-12 23:25:05,235 INFO L226 Difference]: Without dead ends: 511 [2021-11-12 23:25:05,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 953 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13362 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=13141, Invalid=42791, Unknown=0, NotChecked=0, Total=55932 [2021-11-12 23:25:05,239 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 599 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 749.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.79ms SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 932.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:05,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 1340 Invalid, 2070 Unknown, 0 Unchecked, 7.79ms Time], IncrementalHoareTripleChecker [675 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 932.49ms Time] [2021-11-12 23:25:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-12 23:25:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 343. [2021-11-12 23:25:05,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.0087719298245614) internal successors, (345), 342 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 345 transitions. [2021-11-12 23:25:05,273 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 345 transitions. Word has length 340 [2021-11-12 23:25:05,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:05,273 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 345 transitions. [2021-11-12 23:25:05,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 172 states have (on average 3.302325581395349) internal successors, (568), 172 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:05,273 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 345 transitions. [2021-11-12 23:25:05,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-12 23:25:05,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:05,275 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 56, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:05,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:05,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:05,475 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1265984771, now seen corresponding path program 71 times [2021-11-12 23:25:05,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:25:05,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781943979] [2021-11-12 23:25:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:05,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:25:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3080 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:07,094 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:25:07,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781943979] [2021-11-12 23:25:07,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781943979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:07,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680822903] [2021-11-12 23:25:07,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:25:07,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:07,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:25:07,095 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:25:07,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-12 23:25:07,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2021-11-12 23:25:07,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:07,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-12 23:25:07,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3192 proven. 6050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:08,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3192 proven. 6050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:09,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680822903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:09,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [389076856] [2021-11-12 23:25:09,174 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:25:09,174 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:25:09,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:25:09,175 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:25:09,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:25:09,177 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,177 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:09,178 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,178 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:25:09,178 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:09,178 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,179 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:25:09,180 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:25:09,181 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_78|], 10=[|v_#valid_79|]} [2021-11-12 23:25:09,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:09,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:25:09,187 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,187 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:25:09,188 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,188 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:25:09,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:25:09,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:09,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:09,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:09,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:09,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:25:09,199 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:25:09,200 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,201 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:25:09,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:25:09,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,203 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:25:09,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:25:09,205 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:25:09,208 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:25:09,210 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:25:09,212 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,214 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:09,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:25:09,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:25:09,218 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:25:09,221 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:25:09,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,232 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:25:09,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:25:09,238 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:25:09,239 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:09,240 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,241 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:25:09,241 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:25:09,243 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:25:09,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,258 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:25:09,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:09,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:25:09,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,281 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:25:09,283 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:25:09,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:09,294 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:25:09,296 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:25:09,301 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:25:09,303 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:25:09,304 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:25:10,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:25:10,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:25:10,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 62 [2021-11-12 23:25:10,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305047682] [2021-11-12 23:25:10,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:10,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-12 23:25:10,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:25:10,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-12 23:25:10,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1825, Invalid=3287, Unknown=0, NotChecked=0, Total=5112 [2021-11-12 23:25:10,207 INFO L87 Difference]: Start difference. First operand 343 states and 345 transitions. Second operand has 63 states, 63 states have (on average 5.761904761904762) internal successors, (363), 62 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:11,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:11,829 INFO L93 Difference]: Finished difference Result 360 states and 363 transitions. [2021-11-12 23:25:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-11-12 23:25:11,829 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.761904761904762) internal successors, (363), 62 states have internal predecessors, (363), 0 states have call successors, (0), 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 342 [2021-11-12 23:25:11,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:11,831 INFO L225 Difference]: With dead ends: 360 [2021-11-12 23:25:11,831 INFO L226 Difference]: Without dead ends: 358 [2021-11-12 23:25:11,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1197 GetRequests, 1067 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4656 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5488, Invalid=11542, Unknown=0, NotChecked=0, Total=17030 [2021-11-12 23:25:11,833 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 243 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 317.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 382.18ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:11,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 512 Invalid, 776 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [177 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 382.18ms Time] [2021-11-12 23:25:11,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-12 23:25:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 351. [2021-11-12 23:25:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.0085714285714287) internal successors, (353), 350 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 353 transitions. [2021-11-12 23:25:11,873 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 353 transitions. Word has length 342 [2021-11-12 23:25:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:11,873 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 353 transitions. [2021-11-12 23:25:11,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.761904761904762) internal successors, (363), 62 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 353 transitions. [2021-11-12 23:25:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-11-12 23:25:11,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:11,875 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:11,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:12,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1893 [2021-11-12 23:25:12,076 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:12,076 INFO L85 PathProgramCache]: Analyzing trace with hash -423714845, now seen corresponding path program 72 times [2021-11-12 23:25:12,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:25:12,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118968718] [2021-11-12 23:25:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:12,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:25:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6330 proven. 3360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:16,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:25:16,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118968718] [2021-11-12 23:25:16,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118968718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:16,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135677325] [2021-11-12 23:25:16,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:25:16,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:16,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:25:16,500 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:25:16,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-12 23:25:16,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:25:16,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:16,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-12 23:25:16,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6498 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:23,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6498 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:24,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135677325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:24,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385214091] [2021-11-12 23:25:24,128 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:25:24,128 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:25:24,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:25:24,128 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:25:24,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:25:24,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,131 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:24,131 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:25:24,131 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:24,132 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,132 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:25:24,133 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:25:24,134 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_79|], 10=[|v_#valid_80|]} [2021-11-12 23:25:24,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:24,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:25:24,140 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:25:24,140 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,141 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:25:24,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:25:24,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:24,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:24,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:24,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:24,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:25:24,151 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:25:24,152 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,153 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:25:24,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:25:24,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,155 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:25:24,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:25:24,156 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:25:24,160 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:25:24,161 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:25:24,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,165 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:24,165 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:25:24,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:25:24,169 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:25:24,172 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:25:24,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,183 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:25:24,186 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:25:24,189 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:25:24,190 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:24,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,192 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:25:24,192 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:25:24,194 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:25:24,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,210 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:25:24,211 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:24,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:25:24,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,241 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:25:24,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:25:24,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:24,253 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:25:24,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:25:24,260 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:25:24,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:25:24,263 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:25:25,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:25:25,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:25:25,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 179 [2021-11-12 23:25:25,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256976094] [2021-11-12 23:25:25,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:25,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2021-11-12 23:25:25,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:25:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-11-12 23:25:25,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7346, Invalid=27810, Unknown=0, NotChecked=0, Total=35156 [2021-11-12 23:25:25,956 INFO L87 Difference]: Start difference. First operand 351 states and 353 transitions. Second operand has 179 states, 179 states have (on average 3.3240223463687153) internal successors, (595), 179 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:32,710 INFO L93 Difference]: Finished difference Result 991 states and 1053 transitions. [2021-11-12 23:25:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-11-12 23:25:32,710 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 3.3240223463687153) internal successors, (595), 179 states have internal predecessors, (595), 0 states have call successors, (0), 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 350 [2021-11-12 23:25:32,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:32,713 INFO L225 Difference]: With dead ends: 991 [2021-11-12 23:25:32,713 INFO L226 Difference]: Without dead ends: 529 [2021-11-12 23:25:32,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1280 GetRequests, 979 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23196 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=20975, Invalid=70531, Unknown=0, NotChecked=0, Total=91506 [2021-11-12 23:25:32,723 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 758 mSDsluCounter, 1665 mSDsCounter, 0 mSdLazyCounter, 1843 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 932.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.31ms SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 1843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1137.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:32,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1781 Invalid, 2345 Unknown, 0 Unchecked, 10.31ms Time], IncrementalHoareTripleChecker [502 Valid, 1843 Invalid, 0 Unknown, 0 Unchecked, 1137.33ms Time] [2021-11-12 23:25:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-12 23:25:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 355. [2021-11-12 23:25:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.0084745762711864) internal successors, (357), 354 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 357 transitions. [2021-11-12 23:25:32,767 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 357 transitions. Word has length 350 [2021-11-12 23:25:32,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:32,767 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 357 transitions. [2021-11-12 23:25:32,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 3.3240223463687153) internal successors, (595), 179 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:32,767 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 357 transitions. [2021-11-12 23:25:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-11-12 23:25:32,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:32,769 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 58, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:32,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:32,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1920,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:32,970 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:32,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:32,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1182230509, now seen corresponding path program 73 times [2021-11-12 23:25:32,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:25:32,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694726096] [2021-11-12 23:25:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:32,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:25:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3306 proven. 6614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:34,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:25:34,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694726096] [2021-11-12 23:25:34,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694726096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:34,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369936624] [2021-11-12 23:25:34,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:25:34,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:34,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:25:34,698 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:25:34,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-12 23:25:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-12 23:25:34,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3422 proven. 6498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:35,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3422 proven. 6498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:36,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369936624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:36,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1055269255] [2021-11-12 23:25:36,559 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:25:36,560 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:25:36,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:25:36,560 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:25:36,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:25:36,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,563 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:36,563 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:25:36,564 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:36,564 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:25:36,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:25:36,566 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_80|], 10=[|v_#valid_81|]} [2021-11-12 23:25:36,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:36,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:25:36,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,586 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:25:36,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,587 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:25:36,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:25:36,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:36,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:25:36,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:25:36,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:25:36,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:25:36,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,600 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:25:36,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:25:36,601 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:25:36,605 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:25:36,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:25:36,608 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,610 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:36,610 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,611 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:25:36,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:25:36,614 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:25:36,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:25:36,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,630 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:25:36,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:25:36,636 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:25:36,637 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:36,637 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,638 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:25:36,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:25:36,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:25:36,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,655 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:25:36,659 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:36,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:25:36,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,677 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:25:36,679 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:25:36,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:36,690 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:25:36,692 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:25:36,697 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:25:36,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:25:36,700 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:25:37,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:25:37,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:25:37,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 64 [2021-11-12 23:25:37,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668978258] [2021-11-12 23:25:37,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:37,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-12 23:25:37,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:25:37,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-12 23:25:37,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1946, Invalid=3456, Unknown=0, NotChecked=0, Total=5402 [2021-11-12 23:25:37,653 INFO L87 Difference]: Start difference. First operand 355 states and 357 transitions. Second operand has 65 states, 65 states have (on average 5.769230769230769) internal successors, (375), 64 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:39,332 INFO L93 Difference]: Finished difference Result 372 states and 375 transitions. [2021-11-12 23:25:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-12 23:25:39,333 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.769230769230769) internal successors, (375), 64 states have internal predecessors, (375), 0 states have call successors, (0), 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 354 [2021-11-12 23:25:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:39,334 INFO L225 Difference]: With dead ends: 372 [2021-11-12 23:25:39,334 INFO L226 Difference]: Without dead ends: 370 [2021-11-12 23:25:39,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1239 GetRequests, 1105 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4936 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5855, Invalid=12235, Unknown=0, NotChecked=0, Total=18090 [2021-11-12 23:25:39,336 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 373 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 319.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.12ms SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 385.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:39,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 457 Invalid, 798 Unknown, 0 Unchecked, 3.12ms Time], IncrementalHoareTripleChecker [242 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 385.47ms Time] [2021-11-12 23:25:39,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-12 23:25:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 363. [2021-11-12 23:25:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.0082872928176796) internal successors, (365), 362 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 365 transitions. [2021-11-12 23:25:39,373 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 365 transitions. Word has length 354 [2021-11-12 23:25:39,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:39,374 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 365 transitions. [2021-11-12 23:25:39,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.769230769230769) internal successors, (375), 64 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:39,374 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 365 transitions. [2021-11-12 23:25:39,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-12 23:25:39,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:39,375 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 59, 58, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:39,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:39,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1947,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:39,576 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:39,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:39,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1430748371, now seen corresponding path program 74 times [2021-11-12 23:25:39,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:25:39,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266673220] [2021-11-12 23:25:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:39,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:25:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6788 proven. 3596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:44,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:25:44,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266673220] [2021-11-12 23:25:44,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266673220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:44,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885328385] [2021-11-12 23:25:44,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:25:44,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:44,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:25:44,292 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:25:44,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-12 23:25:44,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2021-11-12 23:25:44,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:44,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-12 23:25:44,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6962 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:51,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6962 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:52,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885328385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:52,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886940801] [2021-11-12 23:25:52,745 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:25:52,745 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:25:52,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:25:52,745 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:25:52,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:25:52,747 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,747 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:52,748 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,748 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:25:52,748 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:52,749 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,749 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:25:52,750 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:25:52,751 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_81|], 10=[|v_#valid_82|]} [2021-11-12 23:25:52,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:52,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:25:52,757 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,757 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:25:52,757 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,758 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:25:52,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:25:52,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:52,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:52,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:25:52,768 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:25:52,769 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,770 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:25:52,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:25:52,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,772 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,773 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:25:52,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:25:52,773 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:25:52,777 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:25:52,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:25:52,780 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,782 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:52,782 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:25:52,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:25:52,786 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:25:52,789 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:25:52,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,853 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:25:52,855 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:25:52,858 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:25:52,859 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:25:52,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:25:52,862 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:25:52,863 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,865 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:25:52,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,878 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:25:52,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:52,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:25:52,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,900 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:25:52,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:25:52,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:25:52,913 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:25:52,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:25:52,919 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:25:52,921 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:25:52,923 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:25:54,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:25:54,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:25:54,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121, 121] total 185 [2021-11-12 23:25:54,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176535396] [2021-11-12 23:25:54,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:54,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2021-11-12 23:25:54,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:25:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2021-11-12 23:25:54,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7838, Invalid=29604, Unknown=0, NotChecked=0, Total=37442 [2021-11-12 23:25:54,651 INFO L87 Difference]: Start difference. First operand 363 states and 365 transitions. Second operand has 185 states, 185 states have (on average 3.324324324324324) internal successors, (615), 185 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:01,818 INFO L93 Difference]: Finished difference Result 1025 states and 1089 transitions. [2021-11-12 23:26:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-11-12 23:26:01,818 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 3.324324324324324) internal successors, (615), 185 states have internal predecessors, (615), 0 states have call successors, (0), 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 362 [2021-11-12 23:26:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:01,821 INFO L225 Difference]: With dead ends: 1025 [2021-11-12 23:26:01,821 INFO L226 Difference]: Without dead ends: 547 [2021-11-12 23:26:01,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1324 GetRequests, 1013 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24716 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=22417, Invalid=75239, Unknown=0, NotChecked=0, Total=97656 [2021-11-12 23:26:01,827 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 766 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 946.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.72ms SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1155.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:01,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 1707 Invalid, 2351 Unknown, 0 Unchecked, 10.72ms Time], IncrementalHoareTripleChecker [572 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 1155.55ms Time] [2021-11-12 23:26:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-12 23:26:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 367. [2021-11-12 23:26:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.0081967213114753) internal successors, (369), 366 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 369 transitions. [2021-11-12 23:26:01,874 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 369 transitions. Word has length 362 [2021-11-12 23:26:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:01,874 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 369 transitions. [2021-11-12 23:26:01,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 3.324324324324324) internal successors, (615), 185 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:01,875 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 369 transitions. [2021-11-12 23:26:01,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-12 23:26:01,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:01,877 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 60, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:01,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:02,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1974 [2021-11-12 23:26:02,078 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:02,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1892514339, now seen corresponding path program 75 times [2021-11-12 23:26:02,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:02,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322509443] [2021-11-12 23:26:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:02,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3540 proven. 7082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:03,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:03,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322509443] [2021-11-12 23:26:03,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322509443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:03,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141384031] [2021-11-12 23:26:03,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:26:03,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:03,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:03,978 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:26:03,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-12 23:26:04,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:26:04,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-12 23:26:04,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3660 proven. 6962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:05,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3660 proven. 6962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:06,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141384031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:26:06,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1579676329] [2021-11-12 23:26:06,020 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:26:06,020 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:26:06,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:26:06,020 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:26:06,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:26:06,024 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,025 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:06,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:26:06,026 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:06,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:26:06,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:26:06,035 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_82|], 10=[|v_#valid_83|]} [2021-11-12 23:26:06,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:06,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:26:06,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:26:06,042 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:26:06,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:26:06,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:06,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:06,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:06,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:26:06,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,055 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:26:06,056 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,056 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:26:06,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:26:06,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:26:06,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:26:06,061 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:26:06,065 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:26:06,066 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:26:06,069 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,071 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:06,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:26:06,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:26:06,076 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:26:06,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:26:06,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,094 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:26:06,096 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:26:06,100 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:26:06,101 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:06,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:26:06,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:26:06,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:26:06,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,124 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,126 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:26:06,128 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:06,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:26:06,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,152 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:26:06,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:26:06,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:06,168 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:26:06,170 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:26:06,176 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:26:06,178 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:26:06,180 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:26:07,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:26:07,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:26:07,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 66 [2021-11-12 23:26:07,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190965908] [2021-11-12 23:26:07,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:26:07,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-12 23:26:07,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-12 23:26:07,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3629, Unknown=0, NotChecked=0, Total=5700 [2021-11-12 23:26:07,223 INFO L87 Difference]: Start difference. First operand 367 states and 369 transitions. Second operand has 67 states, 67 states have (on average 5.776119402985074) internal successors, (387), 66 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:09,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:09,040 INFO L93 Difference]: Finished difference Result 384 states and 387 transitions. [2021-11-12 23:26:09,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-11-12 23:26:09,041 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 5.776119402985074) internal successors, (387), 66 states have internal predecessors, (387), 0 states have call successors, (0), 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 366 [2021-11-12 23:26:09,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:09,043 INFO L225 Difference]: With dead ends: 384 [2021-11-12 23:26:09,043 INFO L226 Difference]: Without dead ends: 382 [2021-11-12 23:26:09,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1281 GetRequests, 1143 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5224 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6234, Invalid=12948, Unknown=0, NotChecked=0, Total=19182 [2021-11-12 23:26:09,045 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 383 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 342.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.19ms SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 413.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:09,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 503 Invalid, 850 Unknown, 0 Unchecked, 3.19ms Time], IncrementalHoareTripleChecker [250 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 413.84ms Time] [2021-11-12 23:26:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-12 23:26:09,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 375. [2021-11-12 23:26:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.0080213903743316) internal successors, (377), 374 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 377 transitions. [2021-11-12 23:26:09,092 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 377 transitions. Word has length 366 [2021-11-12 23:26:09,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:09,092 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 377 transitions. [2021-11-12 23:26:09,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 5.776119402985074) internal successors, (387), 66 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 377 transitions. [2021-11-12 23:26:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-11-12 23:26:09,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:09,095 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 61, 60, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:09,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:09,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2001 [2021-11-12 23:26:09,295 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:09,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1941809859, now seen corresponding path program 76 times [2021-11-12 23:26:09,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:09,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720600422] [2021-11-12 23:26:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:09,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7262 proven. 3840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:14,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:14,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720600422] [2021-11-12 23:26:14,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720600422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:14,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145156608] [2021-11-12 23:26:14,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:26:14,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:14,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:14,338 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:26:14,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-12 23:26:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:14,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-12 23:26:14,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7440 proven. 3660 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:26:21,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7440 proven. 3660 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:26:22,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145156608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:26:22,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700785058] [2021-11-12 23:26:22,666 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:26:22,666 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:26:22,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:26:22,666 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:26:22,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:26:22,675 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,676 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:22,676 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,676 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:26:22,677 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:22,677 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:26:22,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:26:22,679 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_83|], 10=[|v_#valid_84|]} [2021-11-12 23:26:22,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:22,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:26:22,685 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,685 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:26:22,686 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,686 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:26:22,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:26:22,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:22,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:22,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:22,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:22,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:26:22,696 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:26:22,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:26:22,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:26:22,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,701 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,702 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:26:22,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:26:22,702 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:26:22,706 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:26:22,707 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:26:22,709 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,711 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:22,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,713 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:26:22,713 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:26:22,715 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:26:22,718 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:26:22,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,729 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:26:22,732 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:26:22,735 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:26:22,736 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:22,737 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,738 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:26:22,738 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:26:22,740 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:26:22,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,754 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,756 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:26:22,758 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:22,760 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:26:22,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,778 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:26:22,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:26:22,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:22,790 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:26:22,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:26:22,797 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:26:22,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:26:22,800 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:26:24,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:26:24,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:26:24,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 124, 124] total 188 [2021-11-12 23:26:24,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453629443] [2021-11-12 23:26:24,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:26:24,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2021-11-12 23:26:24,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:24,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2021-11-12 23:26:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8028, Invalid=30584, Unknown=0, NotChecked=0, Total=38612 [2021-11-12 23:26:24,539 INFO L87 Difference]: Start difference. First operand 375 states and 377 transitions. Second operand has 188 states, 188 states have (on average 3.3297872340425534) internal successors, (626), 188 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:28,989 INFO L93 Difference]: Finished difference Result 809 states and 873 transitions. [2021-11-12 23:26:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-12 23:26:28,990 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 3.3297872340425534) internal successors, (626), 188 states have internal predecessors, (626), 0 states have call successors, (0), 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 374 [2021-11-12 23:26:28,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:28,992 INFO L225 Difference]: With dead ends: 809 [2021-11-12 23:26:28,992 INFO L226 Difference]: Without dead ends: 560 [2021-11-12 23:26:28,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1306 GetRequests, 1050 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15814 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=15594, Invalid=50712, Unknown=0, NotChecked=0, Total=66306 [2021-11-12 23:26:28,997 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 817 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 785.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.94ms SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 971.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:28,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 1459 Invalid, 2153 Unknown, 0 Unchecked, 8.94ms Time], IncrementalHoareTripleChecker [631 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 971.01ms Time] [2021-11-12 23:26:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-12 23:26:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 377. [2021-11-12 23:26:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.0079787234042554) internal successors, (379), 376 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 379 transitions. [2021-11-12 23:26:29,046 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 379 transitions. Word has length 374 [2021-11-12 23:26:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:29,046 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 379 transitions. [2021-11-12 23:26:29,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 3.3297872340425534) internal successors, (626), 188 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:29,046 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 379 transitions. [2021-11-12 23:26:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-11-12 23:26:29,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:29,048 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:29,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:29,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2028,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:29,249 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash 605174376, now seen corresponding path program 77 times [2021-11-12 23:26:29,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:29,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637325987] [2021-11-12 23:26:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:29,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11224 backedges. 7262 proven. 3962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:34,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:34,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637325987] [2021-11-12 23:26:34,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637325987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:34,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778688554] [2021-11-12 23:26:34,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:26:34,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:34,387 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:26:34,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-12 23:26:34,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 62 check-sat command(s) [2021-11-12 23:26:34,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:34,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-12 23:26:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11224 backedges. 7442 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:42,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11224 backedges. 7442 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:43,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778688554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:26:43,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [31359826] [2021-11-12 23:26:43,207 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:26:43,207 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:26:43,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:26:43,208 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:26:43,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:26:43,210 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,210 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:43,210 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:26:43,211 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:43,211 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:26:43,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:26:43,214 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_84|], 10=[|v_#valid_85|]} [2021-11-12 23:26:43,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:43,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:26:43,219 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:26:43,220 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:26:43,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:26:43,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:43,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:43,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:43,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:43,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:26:43,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:26:43,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:26:43,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:26:43,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,266 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,267 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:26:43,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:26:43,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:26:43,274 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:26:43,275 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:26:43,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,280 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:43,281 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,282 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:26:43,283 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:26:43,285 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:26:43,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:26:43,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,299 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:26:43,301 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:26:43,305 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:26:43,306 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:43,306 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:26:43,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:26:43,310 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,311 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:26:43,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,324 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,325 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:26:43,327 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:43,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:26:43,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,347 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:26:43,349 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:26:43,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:43,360 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:26:43,361 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:26:43,366 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:26:43,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:26:43,369 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:26:45,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:26:45,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:26:45,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126, 126] total 190 [2021-11-12 23:26:45,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268849188] [2021-11-12 23:26:45,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:26:45,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-11-12 23:26:45,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:45,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-11-12 23:26:45,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8219, Invalid=31183, Unknown=0, NotChecked=0, Total=39402 [2021-11-12 23:26:45,129 INFO L87 Difference]: Start difference. First operand 377 states and 379 transitions. Second operand has 190 states, 190 states have (on average 3.305263157894737) internal successors, (628), 190 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:49,808 INFO L93 Difference]: Finished difference Result 816 states and 881 transitions. [2021-11-12 23:26:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-11-12 23:26:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 3.305263157894737) internal successors, (628), 190 states have internal predecessors, (628), 0 states have call successors, (0), 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 376 [2021-11-12 23:26:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:49,811 INFO L225 Difference]: With dead ends: 816 [2021-11-12 23:26:49,811 INFO L226 Difference]: Without dead ends: 565 [2021-11-12 23:26:49,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 1055 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16095 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=16033, Invalid=51827, Unknown=0, NotChecked=0, Total=67860 [2021-11-12 23:26:49,816 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 778 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 794.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.54ms SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 980.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:49,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1483 Invalid, 2100 Unknown, 0 Unchecked, 8.54ms Time], IncrementalHoareTripleChecker [551 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 980.87ms Time] [2021-11-12 23:26:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-12 23:26:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 379. [2021-11-12 23:26:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.007936507936508) internal successors, (381), 378 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 381 transitions. [2021-11-12 23:26:49,865 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 381 transitions. Word has length 376 [2021-11-12 23:26:49,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:49,865 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 381 transitions. [2021-11-12 23:26:49,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 3.305263157894737) internal successors, (628), 190 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 381 transitions. [2021-11-12 23:26:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-12 23:26:49,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:49,868 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 62, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:49,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:50,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2055,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:50,068 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:50,069 INFO L85 PathProgramCache]: Analyzing trace with hash 293696717, now seen corresponding path program 78 times [2021-11-12 23:26:50,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:50,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578220488] [2021-11-12 23:26:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:50,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11348 backedges. 3782 proven. 7566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:52,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:52,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578220488] [2021-11-12 23:26:52,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578220488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:52,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567095319] [2021-11-12 23:26:52,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:26:52,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:52,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:52,107 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:26:52,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-12 23:26:52,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:26:52,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:52,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-12 23:26:52,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11348 backedges. 3906 proven. 7442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:53,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11348 backedges. 3906 proven. 7442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:54,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567095319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:26:54,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1587513314] [2021-11-12 23:26:54,155 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:26:54,155 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:26:54,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:26:54,155 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:26:54,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:26:54,162 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,162 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:54,162 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,163 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:26:54,163 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:54,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:26:54,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:26:54,166 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_85|], 10=[|v_#valid_86|]} [2021-11-12 23:26:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:54,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:26:54,172 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,172 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:26:54,172 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,173 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:26:54,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:26:54,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:54,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:54,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:26:54,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:26:54,192 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,193 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:26:54,194 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,194 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:26:54,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:26:54,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,197 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:26:54,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:26:54,198 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:26:54,201 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:26:54,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:26:54,205 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,206 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:54,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,208 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:26:54,209 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:26:54,210 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:26:54,213 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:26:54,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,225 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:26:54,227 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:26:54,231 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:26:54,232 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:26:54,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:26:54,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:26:54,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:26:54,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,250 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,252 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:26:54,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:54,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:26:54,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,278 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:26:54,280 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:26:54,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:26:54,297 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:26:54,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:26:54,307 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:26:54,309 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:26:54,311 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:26:55,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:26:55,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:26:55,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 68 [2021-11-12 23:26:55,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686313947] [2021-11-12 23:26:55,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:26:55,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-12 23:26:55,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:55,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-12 23:26:55,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2200, Invalid=3806, Unknown=0, NotChecked=0, Total=6006 [2021-11-12 23:26:55,373 INFO L87 Difference]: Start difference. First operand 379 states and 381 transitions. Second operand has 69 states, 69 states have (on average 5.782608695652174) internal successors, (399), 68 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:57,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:57,356 INFO L93 Difference]: Finished difference Result 396 states and 399 transitions. [2021-11-12 23:26:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-12 23:26:57,357 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 5.782608695652174) internal successors, (399), 68 states have internal predecessors, (399), 0 states have call successors, (0), 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 378 [2021-11-12 23:26:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:57,359 INFO L225 Difference]: With dead ends: 396 [2021-11-12 23:26:57,359 INFO L226 Difference]: Without dead ends: 394 [2021-11-12 23:26:57,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1323 GetRequests, 1181 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5520 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6625, Invalid=13681, Unknown=0, NotChecked=0, Total=20306 [2021-11-12 23:26:57,361 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 331 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 383.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.78ms SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 462.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:57,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 602 Invalid, 962 Unknown, 0 Unchecked, 3.78ms Time], IncrementalHoareTripleChecker [257 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 462.75ms Time] [2021-11-12 23:26:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-12 23:26:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 387. [2021-11-12 23:26:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 386 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 389 transitions. [2021-11-12 23:26:57,412 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 389 transitions. Word has length 378 [2021-11-12 23:26:57,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:57,412 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 389 transitions. [2021-11-12 23:26:57,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 5.782608695652174) internal successors, (399), 68 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:57,413 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 389 transitions. [2021-11-12 23:26:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-12 23:26:57,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:57,415 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 63, 62, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:57,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:57,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2082 [2021-11-12 23:26:57,615 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1734781363, now seen corresponding path program 79 times [2021-11-12 23:26:57,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:57,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168072094] [2021-11-12 23:26:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:57,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 7752 proven. 4092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:27:02,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:27:02,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168072094] [2021-11-12 23:27:02,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168072094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:02,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580842864] [2021-11-12 23:27:02,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:27:02,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:27:02,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:27:02,977 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:27:02,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-12 23:27:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:03,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-12 23:27:03,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 7936 proven. 3906 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:27:10,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 7936 proven. 3906 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:27:11,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580842864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:11,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270694010] [2021-11-12 23:27:11,003 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:27:11,003 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:27:11,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:27:11,003 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:27:11,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:27:11,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,006 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:27:11,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,006 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:27:11,007 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:27:11,007 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:27:11,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:27:11,009 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_86|], 10=[|v_#valid_87|]} [2021-11-12 23:27:11,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:11,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:27:11,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,015 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:27:11,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,016 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:27:11,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:27:11,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:11,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:11,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:11,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:11,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:27:11,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:27:11,027 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:27:11,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:27:11,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,030 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:27:11,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:27:11,031 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:27:11,034 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:27:11,035 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:27:11,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,040 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:27:11,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:27:11,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:27:11,044 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:27:11,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 23:27:11,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,058 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:27:11,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:27:11,064 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:27:11,064 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:27:11,065 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,066 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:27:11,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:27:11,069 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,070 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:27:11,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,083 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:27:11,086 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:11,089 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:27:11,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,109 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:27:11,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:27:11,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:11,122 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:27:11,126 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:27:11,130 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:27:11,132 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:27:11,133 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:27:12,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:27:12,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:27:12,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 128, 128] total 194 [2021-11-12 23:27:12,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088539789] [2021-11-12 23:27:12,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:27:12,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-11-12 23:27:12,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:27:12,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-11-12 23:27:12,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8542, Invalid=32464, Unknown=0, NotChecked=0, Total=41006 [2021-11-12 23:27:12,819 INFO L87 Difference]: Start difference. First operand 387 states and 389 transitions. Second operand has 194 states, 194 states have (on average 3.329896907216495) internal successors, (646), 194 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:17,702 INFO L93 Difference]: Finished difference Result 835 states and 901 transitions. [2021-11-12 23:27:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-11-12 23:27:17,702 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 3.329896907216495) internal successors, (646), 194 states have internal predecessors, (646), 0 states have call successors, (0), 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 386 [2021-11-12 23:27:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:17,704 INFO L225 Difference]: With dead ends: 835 [2021-11-12 23:27:17,705 INFO L226 Difference]: Without dead ends: 578 [2021-11-12 23:27:17,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1348 GetRequests, 1084 SyntacticMatches, 0 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16773 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=16608, Invalid=53882, Unknown=0, NotChecked=0, Total=70490 [2021-11-12 23:27:17,708 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 692 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 885.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.73ms SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1096.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:17,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 1690 Invalid, 2471 Unknown, 0 Unchecked, 9.73ms Time], IncrementalHoareTripleChecker [703 Valid, 1768 Invalid, 0 Unknown, 0 Unchecked, 1096.50ms Time] [2021-11-12 23:27:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-12 23:27:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 389. [2021-11-12 23:27:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0077319587628866) internal successors, (391), 388 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 391 transitions. [2021-11-12 23:27:17,759 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 391 transitions. Word has length 386 [2021-11-12 23:27:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:17,759 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 391 transitions. [2021-11-12 23:27:17,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 3.329896907216495) internal successors, (646), 194 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:17,759 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 391 transitions. [2021-11-12 23:27:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-11-12 23:27:17,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:17,762 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:17,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:17,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2109,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:27:17,962 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:27:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:17,963 INFO L85 PathProgramCache]: Analyzing trace with hash 617605592, now seen corresponding path program 80 times [2021-11-12 23:27:17,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:27:17,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870121754] [2021-11-12 23:27:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:17,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:27:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11970 backedges. 7752 proven. 4218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:27:23,173 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:27:23,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870121754] [2021-11-12 23:27:23,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870121754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:23,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332346651] [2021-11-12 23:27:23,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:27:23,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:27:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:27:23,175 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:27:23,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-12 23:27:23,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-11-12 23:27:23,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:23,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-12 23:27:23,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11970 backedges. 7938 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:27:31,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11970 backedges. 7938 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:27:32,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332346651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:32,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218952141] [2021-11-12 23:27:32,266 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:27:32,266 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:27:32,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:27:32,266 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:27:32,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:27:32,268 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,269 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:27:32,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:27:32,270 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:27:32,270 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:27:32,271 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:27:32,273 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_87|], 10=[|v_#valid_88|]} [2021-11-12 23:27:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:32,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:27:32,278 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:27:32,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:27:32,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:27:32,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:32,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:32,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:32,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:27:32,290 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:27:32,292 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,292 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:27:32,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:27:32,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,295 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:27:32,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:27:32,296 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:27:32,299 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:27:32,301 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:27:32,303 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,305 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:27:32,305 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,306 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:27:32,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:27:32,309 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:27:32,312 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-12 23:27:32,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,323 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:27:32,326 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:27:32,329 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:27:32,330 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:27:32,331 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,332 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:27:32,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:27:32,335 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,336 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:27:32,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,357 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:27:32,359 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:32,361 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:27:32,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,378 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:27:32,380 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:27:32,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:32,391 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:27:32,393 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:27:32,398 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:27:32,400 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:27:32,402 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:27:34,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:27:34,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:27:34,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130, 130] total 196 [2021-11-12 23:27:34,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955598514] [2021-11-12 23:27:34,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:27:34,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2021-11-12 23:27:34,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:27:34,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2021-11-12 23:27:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8739, Invalid=33081, Unknown=0, NotChecked=0, Total=41820 [2021-11-12 23:27:34,130 INFO L87 Difference]: Start difference. First operand 389 states and 391 transitions. Second operand has 196 states, 196 states have (on average 3.306122448979592) internal successors, (648), 196 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:39,190 INFO L93 Difference]: Finished difference Result 842 states and 909 transitions. [2021-11-12 23:27:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-11-12 23:27:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 3.306122448979592) internal successors, (648), 196 states have internal predecessors, (648), 0 states have call successors, (0), 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 388 [2021-11-12 23:27:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:39,193 INFO L225 Difference]: With dead ends: 842 [2021-11-12 23:27:39,193 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 23:27:39,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1356 GetRequests, 1089 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17062 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=17061, Invalid=55031, Unknown=0, NotChecked=0, Total=72092 [2021-11-12 23:27:39,199 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 775 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 899.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 2638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.14ms SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1114.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:39,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 1624 Invalid, 2638 Unknown, 0 Unchecked, 10.14ms Time], IncrementalHoareTripleChecker [944 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 1114.92ms Time] [2021-11-12 23:27:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 23:27:39,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 391. [2021-11-12 23:27:39,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.0076923076923077) internal successors, (393), 390 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 393 transitions. [2021-11-12 23:27:39,250 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 393 transitions. Word has length 388 [2021-11-12 23:27:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:39,250 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 393 transitions. [2021-11-12 23:27:39,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 3.306122448979592) internal successors, (648), 196 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 393 transitions. [2021-11-12 23:27:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-11-12 23:27:39,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:39,252 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 64, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:39,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:39,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2136 [2021-11-12 23:27:39,453 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:27:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:39,453 INFO L85 PathProgramCache]: Analyzing trace with hash 753513661, now seen corresponding path program 81 times [2021-11-12 23:27:39,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:27:39,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781545676] [2021-11-12 23:27:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:39,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:27:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12098 backedges. 4032 proven. 8066 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:27:41,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:27:41,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781545676] [2021-11-12 23:27:41,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781545676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:41,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013082794] [2021-11-12 23:27:41,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:27:41,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:27:41,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:27:41,561 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:27:41,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-12 23:27:41,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:27:41,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:41,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 131 conjunts are in the unsatisfiable core [2021-11-12 23:27:41,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12098 backedges. 4160 proven. 7938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:27:42,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12098 backedges. 4160 proven. 7938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:27:43,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013082794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:43,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1418377761] [2021-11-12 23:27:43,627 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:27:43,627 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:27:43,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:27:43,628 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:27:43,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:27:43,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,653 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:27:43,653 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:27:43,654 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:27:43,654 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,655 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:27:43,656 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:27:43,658 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_88|], 10=[|v_#valid_89|]} [2021-11-12 23:27:43,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:43,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:27:43,665 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,665 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:27:43,666 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:27:43,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:27:43,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:43,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:43,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:43,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:27:43,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:27:43,678 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,679 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:27:43,679 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:27:43,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:27:43,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,683 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:27:43,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:27:43,683 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:27:43,687 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:27:43,688 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:27:43,691 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,692 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:27:43,693 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,694 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:27:43,695 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:27:43,696 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:27:43,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:27:43,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,719 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:27:43,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:27:43,727 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:27:43,728 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:27:43,728 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:27:43,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:27:43,732 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,734 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:27:43,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,746 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,748 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:27:43,750 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:27:43,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:27:43,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,769 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:27:43,771 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:27:43,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:27:43,782 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:27:43,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:27:43,789 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:27:43,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:27:43,792 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:27:44,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:27:44,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:27:44,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 70 [2021-11-12 23:27:44,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240796291] [2021-11-12 23:27:44,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:27:44,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-12 23:27:44,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:27:44,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-12 23:27:44,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2333, Invalid=3987, Unknown=0, NotChecked=0, Total=6320 [2021-11-12 23:27:44,793 INFO L87 Difference]: Start difference. First operand 391 states and 393 transitions. Second operand has 71 states, 71 states have (on average 5.788732394366197) internal successors, (411), 70 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:46,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:46,711 INFO L93 Difference]: Finished difference Result 408 states and 411 transitions. [2021-11-12 23:27:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-11-12 23:27:46,712 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 5.788732394366197) internal successors, (411), 70 states have internal predecessors, (411), 0 states have call successors, (0), 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 390 [2021-11-12 23:27:46,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:46,714 INFO L225 Difference]: With dead ends: 408 [2021-11-12 23:27:46,714 INFO L226 Difference]: Without dead ends: 406 [2021-11-12 23:27:46,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1365 GetRequests, 1219 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5824 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=7028, Invalid=14434, Unknown=0, NotChecked=0, Total=21462 [2021-11-12 23:27:46,716 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 404 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 358.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.56ms SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 434.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:46,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 541 Invalid, 912 Unknown, 0 Unchecked, 3.56ms Time], IncrementalHoareTripleChecker [266 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 434.91ms Time] [2021-11-12 23:27:46,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-12 23:27:46,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 399. [2021-11-12 23:27:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.0075376884422111) internal successors, (401), 398 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 401 transitions. [2021-11-12 23:27:46,771 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 401 transitions. Word has length 390 [2021-11-12 23:27:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:46,771 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 401 transitions. [2021-11-12 23:27:46,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 5.788732394366197) internal successors, (411), 70 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 401 transitions. [2021-11-12 23:27:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-11-12 23:27:46,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:46,774 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 65, 64, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:46,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:46,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2163,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:27:46,974 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:27:46,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:46,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1917319587, now seen corresponding path program 82 times [2021-11-12 23:27:46,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:27:46,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243065954] [2021-11-12 23:27:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:46,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:27:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12610 backedges. 8258 proven. 4352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:27:52,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:27:52,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243065954] [2021-11-12 23:27:52,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243065954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:52,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962934803] [2021-11-12 23:27:52,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:27:52,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:27:52,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:27:52,391 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:27:52,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-12 23:27:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:52,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-12 23:27:52,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12610 backedges. 8448 proven. 4160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:28:00,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12610 backedges. 8448 proven. 4160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:28:01,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962934803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:01,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [369236572] [2021-11-12 23:28:01,222 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:28:01,222 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:28:01,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:28:01,222 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:28:01,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:28:01,224 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,224 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:28:01,225 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:28:01,225 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:28:01,226 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:28:01,227 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:28:01,228 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_89|], 10=[|v_#valid_90|]} [2021-11-12 23:28:01,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:01,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:28:01,234 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:28:01,234 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:28:01,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:28:01,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:01,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:01,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:01,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:01,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:28:01,260 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:28:01,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:28:01,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:28:01,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,267 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:28:01,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:28:01,269 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:28:01,274 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:28:01,276 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:28:01,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,282 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:28:01,282 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,284 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:28:01,285 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:28:01,288 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:28:01,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:28:01,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,309 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:28:01,312 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:28:01,317 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:28:01,318 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:28:01,319 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,320 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:28:01,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:28:01,323 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,326 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-12 23:28:01,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,345 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,347 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:28:01,350 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:01,353 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:28:01,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,378 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:28:01,381 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:28:01,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:01,397 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:28:01,400 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:28:01,407 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:28:01,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:28:01,411 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:28:03,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:28:03,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:28:03,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 132, 132] total 200 [2021-11-12 23:28:03,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829209971] [2021-11-12 23:28:03,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:28:03,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2021-11-12 23:28:03,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:28:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2021-11-12 23:28:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9072, Invalid=34400, Unknown=0, NotChecked=0, Total=43472 [2021-11-12 23:28:03,040 INFO L87 Difference]: Start difference. First operand 399 states and 401 transitions. Second operand has 200 states, 200 states have (on average 3.33) internal successors, (666), 200 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:08,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:08,191 INFO L93 Difference]: Finished difference Result 861 states and 929 transitions. [2021-11-12 23:28:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-12 23:28:08,191 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 3.33) internal successors, (666), 200 states have internal predecessors, (666), 0 states have call successors, (0), 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 398 [2021-11-12 23:28:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:08,194 INFO L225 Difference]: With dead ends: 861 [2021-11-12 23:28:08,194 INFO L226 Difference]: Without dead ends: 596 [2021-11-12 23:28:08,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1390 GetRequests, 1118 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17760 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=17654, Invalid=57148, Unknown=0, NotChecked=0, Total=74802 [2021-11-12 23:28:08,199 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 747 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 862.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.46ms SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1069.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:08,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 1541 Invalid, 2416 Unknown, 0 Unchecked, 9.46ms Time], IncrementalHoareTripleChecker [807 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 1069.53ms Time] [2021-11-12 23:28:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-12 23:28:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 401. [2021-11-12 23:28:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.0075) internal successors, (403), 400 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 403 transitions. [2021-11-12 23:28:08,255 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 403 transitions. Word has length 398 [2021-11-12 23:28:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:08,255 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 403 transitions. [2021-11-12 23:28:08,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 3.33) internal successors, (666), 200 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 403 transitions. [2021-11-12 23:28:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-11-12 23:28:08,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:08,259 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:08,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:08,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2190,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:28:08,463 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:08,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:08,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1799280056, now seen corresponding path program 83 times [2021-11-12 23:28:08,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:28:08,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440092254] [2021-11-12 23:28:08,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:08,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:28:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12740 backedges. 8258 proven. 4482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:28:13,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:28:13,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440092254] [2021-11-12 23:28:13,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440092254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:28:13,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196445323] [2021-11-12 23:28:13,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:28:13,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:28:13,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:28:13,871 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:28:13,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-12 23:28:14,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2021-11-12 23:28:14,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:14,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-12 23:28:14,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12740 backedges. 8450 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:28:22,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12740 backedges. 8450 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:28:23,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196445323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:23,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [404086010] [2021-11-12 23:28:23,149 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:28:23,149 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:28:23,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:28:23,150 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:28:23,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:28:23,156 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,157 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:28:23,157 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,157 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:28:23,158 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:28:23,158 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:28:23,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:28:23,160 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_90|], 10=[|v_#valid_91|]} [2021-11-12 23:28:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:23,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:28:23,166 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:28:23,167 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:28:23,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:28:23,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:23,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:23,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:23,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:23,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:28:23,179 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,180 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:28:23,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,181 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:28:23,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:28:23,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,183 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,184 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:28:23,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:28:23,184 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:28:23,188 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:28:23,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:28:23,192 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,193 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:28:23,193 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,195 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:28:23,195 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:28:23,197 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:28:23,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:28:23,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,211 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:28:23,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:28:23,217 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:28:23,218 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:28:23,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:28:23,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:28:23,222 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,224 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:28:23,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-12 23:28:23,240 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:23,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-12 23:28:23,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,260 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:28:23,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:28:23,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:23,273 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:28:23,274 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:28:23,279 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:28:23,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:28:23,283 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:28:25,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:28:25,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:28:25,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134, 134] total 202 [2021-11-12 23:28:25,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675029750] [2021-11-12 23:28:25,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:28:25,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2021-11-12 23:28:25,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:28:25,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2021-11-12 23:28:25,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9275, Invalid=35035, Unknown=0, NotChecked=0, Total=44310 [2021-11-12 23:28:25,036 INFO L87 Difference]: Start difference. First operand 401 states and 403 transitions. Second operand has 202 states, 202 states have (on average 3.3069306930693068) internal successors, (668), 202 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:30,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:30,409 INFO L93 Difference]: Finished difference Result 868 states and 937 transitions. [2021-11-12 23:28:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-11-12 23:28:30,409 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 3.3069306930693068) internal successors, (668), 202 states have internal predecessors, (668), 0 states have call successors, (0), 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 400 [2021-11-12 23:28:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:30,412 INFO L225 Difference]: With dead ends: 868 [2021-11-12 23:28:30,413 INFO L226 Difference]: Without dead ends: 601 [2021-11-12 23:28:30,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 1123 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18057 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=18121, Invalid=58331, Unknown=0, NotChecked=0, Total=76452 [2021-11-12 23:28:30,417 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 635 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 854.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1843 SdHoareTripleChecker+Invalid, 2332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.62ms SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1064.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:30,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 1843 Invalid, 2332 Unknown, 0 Unchecked, 9.62ms Time], IncrementalHoareTripleChecker [422 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 1064.10ms Time] [2021-11-12 23:28:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-12 23:28:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 403. [2021-11-12 23:28:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.007462686567164) internal successors, (405), 402 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 405 transitions. [2021-11-12 23:28:30,474 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 405 transitions. Word has length 400 [2021-11-12 23:28:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:30,474 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 405 transitions. [2021-11-12 23:28:30,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 3.3069306930693068) internal successors, (668), 202 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 405 transitions. [2021-11-12 23:28:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-11-12 23:28:30,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:30,477 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 66, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:30,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:30,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2217,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:28:30,678 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:30,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:30,678 INFO L85 PathProgramCache]: Analyzing trace with hash -38746707, now seen corresponding path program 84 times [2021-11-12 23:28:30,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:28:30,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615031352] [2021-11-12 23:28:30,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:30,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:28:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12872 backedges. 4290 proven. 8582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:28:32,838 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:28:32,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615031352] [2021-11-12 23:28:32,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615031352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:28:32,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713808195] [2021-11-12 23:28:32,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:28:32,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:28:32,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:28:32,841 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:28:32,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-12 23:28:33,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:28:33,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:33,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 135 conjunts are in the unsatisfiable core [2021-11-12 23:28:33,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12872 backedges. 4422 proven. 8450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:28:34,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12872 backedges. 4422 proven. 8450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:28:35,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713808195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:35,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1998081282] [2021-11-12 23:28:35,016 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-12 23:28:35,016 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:28:35,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:28:35,017 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:28:35,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:28:35,019 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,020 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:28:35,020 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,020 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:28:35,021 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:28:35,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:28:35,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-12 23:28:35,023 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_91|], 10=[|v_#valid_92|]} [2021-11-12 23:28:35,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:35,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:28:35,047 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,047 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:28:35,052 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,052 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:28:35,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:28:35,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:35,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:35,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:35,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:28:35,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:28:35,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:28:35,065 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:28:35,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:28:35,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,068 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:28:35,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:28:35,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:100, output treesize:85 [2021-11-12 23:28:35,072 INFO L180 QuantifierPusher]: treesize reduction 13, result has 87.3 percent of original size [2021-11-12 23:28:35,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-11-12 23:28:35,076 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,077 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:28:35,078 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:28:35,080 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-12 23:28:35,081 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 23:28:35,084 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-12 23:28:35,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,096 INFO L180 QuantifierPusher]: treesize reduction 24, result has 72.4 percent of original size [2021-11-12 23:28:35,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:28:35,102 INFO L180 QuantifierPusher]: treesize reduction 24, result has 68.0 percent of original size [2021-11-12 23:28:35,103 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:28:35,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:28:35,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:28:35,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,109 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:28:35,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,125 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:28:35,127 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:28:35,129 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-11-12 23:28:35,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,146 INFO L180 QuantifierPusher]: treesize reduction 24, result has 77.1 percent of original size [2021-11-12 23:28:35,148 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:28:35,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:28:35,159 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:28:35,160 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:28:35,165 INFO L180 QuantifierPusher]: treesize reduction 24, result has 76.5 percent of original size [2021-11-12 23:28:35,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:28:35,169 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:28:36,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:28:36,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:28:36,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 72 [2021-11-12 23:28:36,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556895966] [2021-11-12 23:28:36,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:28:36,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-12 23:28:36,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:28:36,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-12 23:28:36,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2470, Invalid=4172, Unknown=0, NotChecked=0, Total=6642 [2021-11-12 23:28:36,219 INFO L87 Difference]: Start difference. First operand 403 states and 405 transitions. Second operand has 73 states, 73 states have (on average 5.794520547945205) internal successors, (423), 72 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:38,286 INFO L93 Difference]: Finished difference Result 420 states and 423 transitions. [2021-11-12 23:28:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-11-12 23:28:38,286 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 5.794520547945205) internal successors, (423), 72 states have internal predecessors, (423), 0 states have call successors, (0), 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 402 [2021-11-12 23:28:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:38,288 INFO L225 Difference]: With dead ends: 420 [2021-11-12 23:28:38,288 INFO L226 Difference]: Without dead ends: 418 [2021-11-12 23:28:38,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1407 GetRequests, 1257 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6136 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7443, Invalid=15207, Unknown=0, NotChecked=0, Total=22650 [2021-11-12 23:28:38,291 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 357 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 383.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.77ms SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 465.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:38,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 596 Invalid, 978 Unknown, 0 Unchecked, 3.77ms Time], IncrementalHoareTripleChecker [273 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 465.04ms Time] [2021-11-12 23:28:38,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-12 23:28:38,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 411. [2021-11-12 23:28:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.0073170731707317) internal successors, (413), 410 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:38,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 413 transitions. [2021-11-12 23:28:38,346 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 413 transitions. Word has length 402 [2021-11-12 23:28:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:38,346 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 413 transitions. [2021-11-12 23:28:38,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 5.794520547945205) internal successors, (423), 72 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:38,347 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 413 transitions. [2021-11-12 23:28:38,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-11-12 23:28:38,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:38,349 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 67, 66, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:38,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:38,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2244,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55bffe-bf41-4458-9b33-48e653392db1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:28:38,549 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:38,550 INFO L85 PathProgramCache]: Analyzing trace with hash -752412013, now seen corresponding path program 85 times [2021-11-12 23:28:38,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:28:38,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832345727] [2021-11-12 23:28:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:38,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:28:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat