./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI --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 c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:59:44,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:59:44,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:59:44,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:59:44,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:59:44,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:59:44,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:59:44,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:59:44,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:59:44,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:59:44,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:59:44,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:59:44,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:59:44,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:59:44,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:59:44,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:59:44,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:59:44,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:59:44,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:59:44,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:59:44,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:59:44,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:59:44,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:59:44,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:59:44,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:59:44,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:59:44,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:59:44,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:59:44,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:59:44,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:59:44,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:59:44,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:59:44,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:59:44,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:59:44,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:59:44,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:59:44,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:59:44,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:59:44,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:59:44,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:59:44,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:59:44,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:59:44,682 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:59:44,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:59:44,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:59:44,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:59:44,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:59:44,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:59:44,685 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:59:44,685 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:59:44,685 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:59:44,686 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:59:44,686 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:59:44,686 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:59:44,687 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:59:44,687 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:59:44,687 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:59:44,687 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:59:44,688 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:59:44,688 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:59:44,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:59:44,689 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:59:44,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:59:44,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:59:44,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:59:44,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:59:44,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:59:44,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:59:44,691 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:59:44,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:59:44,692 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:59:44,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:59:44,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:59:44,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:59:44,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:59:44,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:59:44,694 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:59:44,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:59:44,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:59:44,694 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:59:44,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:59:44,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:59:44,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:59:44,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 [2022-11-03 01:59:45,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:59:45,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:59:45,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:59:45,091 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:59:45,092 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:59:45,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-tiling/pnr4.c [2022-11-03 01:59:45,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/data/6b6d69626/e2970abec78b49df8b061a35d65ed292/FLAGe9129e7a5 [2022-11-03 01:59:45,662 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:59:45,663 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/sv-benchmarks/c/array-tiling/pnr4.c [2022-11-03 01:59:45,682 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/data/6b6d69626/e2970abec78b49df8b061a35d65ed292/FLAGe9129e7a5 [2022-11-03 01:59:46,045 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/data/6b6d69626/e2970abec78b49df8b061a35d65ed292 [2022-11-03 01:59:46,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:59:46,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:59:46,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:59:46,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:59:46,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:59:46,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5637cac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46, skipping insertion in model container [2022-11-03 01:59:46,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:59:46,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:59:46,335 WARN L230 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_a20a4a64-71b6-4ccb-9295-648d90af2a95/sv-benchmarks/c/array-tiling/pnr4.c[395,408] [2022-11-03 01:59:46,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:59:46,384 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:59:46,414 WARN L230 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_a20a4a64-71b6-4ccb-9295-648d90af2a95/sv-benchmarks/c/array-tiling/pnr4.c[395,408] [2022-11-03 01:59:46,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:59:46,473 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:59:46,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46 WrapperNode [2022-11-03 01:59:46,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:59:46,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:59:46,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:59:46,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:59:46,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,546 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-11-03 01:59:46,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:59:46,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:59:46,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:59:46,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:59:46,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,595 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:59:46,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:59:46,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:59:46,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:59:46,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46" (1/1) ... [2022-11-03 01:59:46,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:59:46,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:46,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:59:46,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:59:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:59:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:59:46,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:59:46,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:59:46,709 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-11-03 01:59:46,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-11-03 01:59:46,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:59:46,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:59:46,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:59:46,788 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:59:46,790 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:59:47,053 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:59:47,171 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:59:47,172 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 01:59:47,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:59:47 BoogieIcfgContainer [2022-11-03 01:59:47,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:59:47,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:59:47,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:59:47,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:59:47,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:59:46" (1/3) ... [2022-11-03 01:59:47,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f7e0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:59:47, skipping insertion in model container [2022-11-03 01:59:47,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:46" (2/3) ... [2022-11-03 01:59:47,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f7e0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:59:47, skipping insertion in model container [2022-11-03 01:59:47,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:59:47" (3/3) ... [2022-11-03 01:59:47,186 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr4.c [2022-11-03 01:59:47,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:59:47,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:59:47,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:59:47,322 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1d295a93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:59:47,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:59:47,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:59:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:59:47,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:47,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:47,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash 747918148, now seen corresponding path program 1 times [2022-11-03 01:59:47,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:47,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465764823] [2022-11-03 01:59:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:47,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:48,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:48,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465764823] [2022-11-03 01:59:48,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465764823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:48,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:48,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:59:48,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518367138] [2022-11-03 01:59:48,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:48,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:59:48,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:48,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:59:48,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:48,176 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:48,384 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-11-03 01:59:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:59:48,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-11-03 01:59:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:48,399 INFO L225 Difference]: With dead ends: 42 [2022-11-03 01:59:48,400 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 01:59:48,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:48,417 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:48,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 20 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 01:59:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 20. [2022-11-03 01:59:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:59:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-11-03 01:59:48,470 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 7 [2022-11-03 01:59:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:48,471 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-11-03 01:59:48,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-11-03 01:59:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 01:59:48,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:48,474 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:48,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:59:48,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1318552209, now seen corresponding path program 1 times [2022-11-03 01:59:48,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:48,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544972725] [2022-11-03 01:59:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:48,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:59:50,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:50,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544972725] [2022-11-03 01:59:50,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544972725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:50,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279448016] [2022-11-03 01:59:50,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:50,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:50,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:50,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:50,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:59:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:50,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 01:59:50,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:50,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:59:50,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 01:59:50,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 01:59:50,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 01:59:50,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 01:59:50,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2022-11-03 01:59:50,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-11-03 01:59:50,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-03 01:59:51,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 01:59:51,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2022-11-03 01:59:51,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-11-03 01:59:51,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-03 01:59:51,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:51,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 61 [2022-11-03 01:59:51,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:59:51,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:59:51,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:51,497 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:59:51,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:59:51,535 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:59:51,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-03 01:59:51,562 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:59:51,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 39 [2022-11-03 01:59:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:59:51,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279448016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:51,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1078953424] [2022-11-03 01:59:51,722 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 01:59:51,723 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:51,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:59:51,733 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:59:51,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:59:51,845 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 01:59:51,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 01:59:51,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:59:52,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 01:59:52,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2022-11-03 01:59:52,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 01:59:52,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:52,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:52,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:52,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:52,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:52,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:52,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:52,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:52,956 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 01:59:52,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 819 treesize of output 842 [2022-11-03 01:59:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:53,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:53,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 666 treesize of output 647 [2022-11-03 01:59:53,722 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 01:59:53,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-11-03 01:59:53,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-03 01:59:57,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:57,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:57,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 01:59:57,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 01:59:57,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 01:59:57,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 01:59:57,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:57,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:57,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:57,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:58,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:58,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:58,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:58,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:58,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:58,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:58,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:58,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:58,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 01:59:59,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 01:59:59,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 01:59:59,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 01:59:59,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:59,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:59:59,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 01:59:59,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 01:59:59,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 01:59:59,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:00:00,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:00,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:00,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:00:00,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:00:00,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:00,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:00:00,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:00,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:00,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:00,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:00,949 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:00:00,952 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:02,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '272#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:02,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:02,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:02,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-03 02:00:02,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419429281] [2022-11-03 02:00:02,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:02,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:00:02,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:00:02,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:00:02,766 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:00:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:03,294 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-11-03 02:00:03,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:00:03,296 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 24 [2022-11-03 02:00:03,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:03,297 INFO L225 Difference]: With dead ends: 38 [2022-11-03 02:00:03,297 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 02:00:03,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=275, Invalid=1447, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:00:03,299 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:03,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 64 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:00:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 02:00:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2022-11-03 02:00:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:00:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-03 02:00:03,308 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 24 [2022-11-03 02:00:03,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:03,308 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-03 02:00:03,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:00:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-03 02:00:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:00:03,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:03,310 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:03,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:00:03,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:03,537 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash -776537341, now seen corresponding path program 1 times [2022-11-03 02:00:03,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:03,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093846854] [2022-11-03 02:00:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:03,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:00:04,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:04,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093846854] [2022-11-03 02:00:04,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093846854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:04,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391426583] [2022-11-03 02:00:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:04,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:04,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:04,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:04,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:00:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:04,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:00:04,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:04,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:00:04,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:00:04,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 02:00:04,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:00:04,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 02:00:04,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-11-03 02:00:04,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-11-03 02:00:04,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-03 02:00:04,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-03 02:00:04,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:00:04,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-11-03 02:00:04,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-03 02:00:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:00:04,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:04,996 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:00:04,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:00:05,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2022-11-03 02:00:05,026 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 02:00:05,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2022-11-03 02:00:05,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2022-11-03 02:00:05,042 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:00:05,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-03 02:00:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:00:05,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391426583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:05,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627833845] [2022-11-03 02:00:05,141 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:00:05,141 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:05,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:05,142 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:05,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:05,218 INFO L356 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-03 02:00:05,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-03 02:00:05,278 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:00:05,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:00:05,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:00:05,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 104 [2022-11-03 02:00:05,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:00:05,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:05,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:05,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:05,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:05,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:05,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:05,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:05,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:05,973 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:00:05,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 856 treesize of output 879 [2022-11-03 02:00:06,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:06,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:06,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:06,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 667 treesize of output 646 [2022-11-03 02:00:06,345 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:00:06,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-11-03 02:00:06,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-03 02:00:09,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:09,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:09,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:00:09,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:09,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:00:09,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:00:09,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:09,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:10,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:10,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:10,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:10,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:10,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:10,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:10,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:10,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:10,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:10,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:10,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:00:10,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:10,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:00:11,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:00:11,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:11,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:11,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:00:11,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:00:11,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:11,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:00:12,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:12,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:12,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:00:12,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:00:12,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:12,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:00:12,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:12,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:12,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:12,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:13,192 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:00:13,195 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:15,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '561#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:15,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:15,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:15,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-03 02:00:15,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390066802] [2022-11-03 02:00:15,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:15,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:00:15,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:15,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:00:15,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:00:15,403 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:00:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:16,306 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2022-11-03 02:00:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:00:16,307 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 27 [2022-11-03 02:00:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:16,308 INFO L225 Difference]: With dead ends: 55 [2022-11-03 02:00:16,308 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 02:00:16,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=358, Invalid=1898, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:00:16,310 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 77 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:16,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 122 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:00:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 02:00:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 25. [2022-11-03 02:00:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:00:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-03 02:00:16,321 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 27 [2022-11-03 02:00:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:16,321 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-03 02:00:16,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:00:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-03 02:00:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:00:16,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:16,323 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:16,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:16,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:16,539 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1124575919, now seen corresponding path program 2 times [2022-11-03 02:00:16,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:16,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635047233] [2022-11-03 02:00:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:16,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:00:17,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:17,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635047233] [2022-11-03 02:00:17,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635047233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:17,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909585402] [2022-11-03 02:00:17,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:17,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:17,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:17,221 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:17,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:00:17,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:00:17,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:17,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:00:17,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:17,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:00:17,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 02:00:17,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:00:17,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:00:17,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-03 02:00:17,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-03 02:00:17,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:00:17,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-03 02:00:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:00:17,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:17,839 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:00:17,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:00:17,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 40 [2022-11-03 02:00:17,873 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:00:17,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-03 02:00:17,896 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:00:17,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2022-11-03 02:00:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:00:18,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909585402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060603675] [2022-11-03 02:00:18,021 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:00:18,021 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:18,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:18,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:18,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:18,120 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:00:18,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:00:18,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:00:18,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:00:18,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 105 [2022-11-03 02:00:18,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:00:18,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:18,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:18,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:18,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:18,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:18,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:18,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:18,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:18,790 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:00:18,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 830 treesize of output 853 [2022-11-03 02:00:18,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:18,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:18,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:18,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 659 treesize of output 640 [2022-11-03 02:00:19,113 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:00:19,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-11-03 02:00:19,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:21,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:21,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:22,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:00:22,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:22,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:00:22,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:00:22,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:22,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:22,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:22,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:22,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:22,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:23,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:23,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:23,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:23,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:23,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:23,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:23,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:00:23,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:23,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:00:23,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:00:24,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:24,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:24,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:00:24,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:24,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 154 [2022-11-03 02:00:24,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:00:24,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:24,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:24,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:00:24,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:24,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:00:24,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:00:25,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:25,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:25,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:25,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:25,740 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:00:25,742 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:27,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '914#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:27,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:27,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:27,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 22 [2022-11-03 02:00:27,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172232141] [2022-11-03 02:00:27,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:27,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:00:27,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:27,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:00:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:00:27,965 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:00:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:28,960 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-11-03 02:00:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:00:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 30 [2022-11-03 02:00:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:28,963 INFO L225 Difference]: With dead ends: 67 [2022-11-03 02:00:28,963 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 02:00:28,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=373, Invalid=2383, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 02:00:28,965 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 78 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:28,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 148 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:00:28,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 02:00:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 28. [2022-11-03 02:00:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:00:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-03 02:00:28,985 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 30 [2022-11-03 02:00:28,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:28,985 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-03 02:00:28,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:00:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-03 02:00:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:00:28,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:28,987 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:29,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:29,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:29,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:29,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1490800573, now seen corresponding path program 3 times [2022-11-03 02:00:29,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:29,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252763886] [2022-11-03 02:00:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:29,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:00:29,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:29,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252763886] [2022-11-03 02:00:29,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252763886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:29,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58614162] [2022-11-03 02:00:29,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:00:29,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:29,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:29,670 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:29,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:00:29,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:00:29,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:29,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:00:29,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:29,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 02:00:29,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:00:29,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 02:00:29,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:00:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:00:30,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:30,227 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:00:30,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:00:30,259 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:00:30,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-03 02:00:30,284 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:00:30,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2022-11-03 02:00:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:00:30,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58614162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:30,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1471119644] [2022-11-03 02:00:30,434 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:00:30,434 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:30,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:30,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:30,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:30,512 INFO L356 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-03 02:00:30,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-03 02:00:30,579 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:00:30,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:00:30,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:00:30,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:30,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:30,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 110 [2022-11-03 02:00:30,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:00:31,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:31,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:31,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:31,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:31,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:31,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:31,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:31,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:31,256 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:00:31,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 815 treesize of output 838 [2022-11-03 02:00:31,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:31,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:31,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 644 treesize of output 627 [2022-11-03 02:00:31,534 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:00:31,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-11-03 02:00:31,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:34,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:34,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:34,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:00:34,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:34,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:00:34,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:00:34,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:34,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:35,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:35,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:35,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:35,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:35,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:35,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:35,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:35,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:35,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:35,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:35,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:00:35,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:35,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:00:35,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:00:36,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:36,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:36,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:00:36,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:00:36,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:36,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:00:36,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:36,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:36,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:00:36,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:00:36,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:36,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:00:37,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:37,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:37,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:37,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:37,720 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:00:37,723 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:39,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1315#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:39,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:39,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:39,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 26 [2022-11-03 02:00:39,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107212387] [2022-11-03 02:00:39,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:39,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:00:39,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:39,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:00:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1538, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:00:39,960 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:00:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:41,974 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2022-11-03 02:00:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:00:41,975 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 33 [2022-11-03 02:00:41,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:41,976 INFO L225 Difference]: With dead ends: 89 [2022-11-03 02:00:41,976 INFO L226 Difference]: Without dead ends: 87 [2022-11-03 02:00:41,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=624, Invalid=4068, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 02:00:41,979 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 115 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:41,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 214 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:00:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-03 02:00:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 31. [2022-11-03 02:00:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:00:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-03 02:00:41,994 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 33 [2022-11-03 02:00:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:41,994 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-03 02:00:41,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:00:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-03 02:00:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:00:41,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:41,996 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:42,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:42,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:42,202 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:42,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:42,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1822431249, now seen corresponding path program 4 times [2022-11-03 02:00:42,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:42,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797757511] [2022-11-03 02:00:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:42,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:00:42,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797757511] [2022-11-03 02:00:42,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797757511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472061248] [2022-11-03 02:00:42,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:00:42,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:42,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:42,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:42,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:00:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:42,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:00:42,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:00:43,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:00:43,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472061248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:43,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [59325323] [2022-11-03 02:00:43,318 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:00:43,318 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:43,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:43,319 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:43,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:43,384 INFO L356 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-03 02:00:43,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-03 02:00:43,441 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:00:43,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:00:43,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:00:43,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 128 [2022-11-03 02:00:43,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:00:44,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:44,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:44,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:44,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:44,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:44,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:44,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:44,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:44,071 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:00:44,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 807 treesize of output 830 [2022-11-03 02:00:44,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:44,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:44,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:44,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 600 treesize of output 587 [2022-11-03 02:00:44,545 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:00:44,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 504 [2022-11-03 02:00:44,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:46,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:46,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:47,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:00:47,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:47,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:00:47,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:00:47,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:47,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:47,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:47,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:47,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:47,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:48,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:48,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:48,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:48,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:48,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:48,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:48,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:00:48,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:48,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:00:48,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:00:48,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:48,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:48,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:00:48,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:00:48,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:48,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:00:49,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:49,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:49,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:00:49,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:49,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:00:49,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:00:49,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:49,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:50,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:50,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:50,216 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:00:50,218 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:52,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1794#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:52,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:52,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:52,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 26 [2022-11-03 02:00:52,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146560678] [2022-11-03 02:00:52,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:52,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:00:52,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:52,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:00:52,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:00:52,371 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:00:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:52,730 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-11-03 02:00:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:00:52,731 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 36 [2022-11-03 02:00:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:52,732 INFO L225 Difference]: With dead ends: 66 [2022-11-03 02:00:52,733 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 02:00:52,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:00:52,734 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:52,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 45 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:00:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 02:00:52,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2022-11-03 02:00:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 02:00:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-11-03 02:00:52,761 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 36 [2022-11-03 02:00:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:52,761 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-11-03 02:00:52,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:00:52,762 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-11-03 02:00:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:00:52,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:52,765 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:52,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:52,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:52,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:52,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1961813988, now seen corresponding path program 5 times [2022-11-03 02:00:52,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:52,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338710130] [2022-11-03 02:00:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:52,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:00:54,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:54,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338710130] [2022-11-03 02:00:54,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338710130] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:54,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053060878] [2022-11-03 02:00:54,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:54,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:54,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:54,365 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:54,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:00:54,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:00:54,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:54,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:00:54,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:54,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:00:54,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:00:54,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 02:00:54,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:00:54,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 02:00:54,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:00:54,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-11-03 02:00:54,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-03 02:00:54,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 02:00:54,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:00:54,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-11-03 02:00:54,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-03 02:00:54,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-03 02:00:54,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-03 02:00:54,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:00:54,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-03 02:00:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:00:55,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:55,297 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:00:55,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:00:55,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2022-11-03 02:00:55,326 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 02:00:55,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2022-11-03 02:00:55,336 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:00:55,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-03 02:00:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:00:55,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053060878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:55,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [113508340] [2022-11-03 02:00:55,466 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:00:55,466 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:55,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:55,467 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:55,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:55,536 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:00:55,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:00:55,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:00:55,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:00:55,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:55,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 124 [2022-11-03 02:00:55,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:00:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:56,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:56,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:56,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:56,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:56,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:56,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:56,073 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:00:56,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 796 treesize of output 819 [2022-11-03 02:00:56,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:56,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 607 treesize of output 594 [2022-11-03 02:00:56,320 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:00:56,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 520 [2022-11-03 02:00:56,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:58,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:58,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:58,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:00:58,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:00:58,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:00:58,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:00:59,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:59,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:59,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:59,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:59,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:59,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:59,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:59,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:00,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:00,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:00,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:00,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:00,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:01:00,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:00,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:01:00,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:01:00,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:00,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:00,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:01:00,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:00,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 154 [2022-11-03 02:01:00,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:01:01,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:01,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:01,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:01:01,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:01:01,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:01,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:01:01,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:01,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:01,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:01,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:02,010 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:01:02,011 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:04,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2310#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:04,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:04,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:04,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-11-03 02:01:04,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8721813] [2022-11-03 02:01:04,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:04,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:01:04,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:04,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:01:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:01:04,222 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 9 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-03 02:01:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:06,382 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2022-11-03 02:01:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 02:01:06,383 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 9 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 53 [2022-11-03 02:01:06,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:06,386 INFO L225 Difference]: With dead ends: 113 [2022-11-03 02:01:06,386 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 02:01:06,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=678, Invalid=5022, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 02:01:06,389 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 96 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:06,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 225 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:01:06,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 02:01:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 43. [2022-11-03 02:01:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 02:01:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-03 02:01:06,425 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 53 [2022-11-03 02:01:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:06,425 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-03 02:01:06,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 9 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-03 02:01:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-03 02:01:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:01:06,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:06,427 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:06,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 02:01:06,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:06,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:06,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1508953904, now seen corresponding path program 6 times [2022-11-03 02:01:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:06,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126169041] [2022-11-03 02:01:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:06,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:01:07,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:07,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126169041] [2022-11-03 02:01:07,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126169041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:07,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311468088] [2022-11-03 02:01:07,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:01:07,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:07,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:07,456 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:07,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:01:07,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:01:07,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:07,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:01:07,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:07,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:01:07,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:01:07,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 02:01:07,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2022-11-03 02:01:07,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-11-03 02:01:07,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-03 02:01:07,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-03 02:01:07,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-03 02:01:07,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:01:07,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-03 02:01:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:01:08,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:08,271 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:08,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:01:08,293 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:08,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-03 02:01:08,325 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:08,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 39 [2022-11-03 02:01:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:01:08,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311468088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:08,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396458016] [2022-11-03 02:01:08,520 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:01:08,520 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:08,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:08,520 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:08,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:08,583 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:01:08,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:01:08,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:01:08,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:01:08,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:08,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:08,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 104 [2022-11-03 02:01:08,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:01:09,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:09,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:09,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:09,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:09,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:09,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:09,095 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:01:09,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 856 treesize of output 879 [2022-11-03 02:01:09,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:09,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:09,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:09,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 667 treesize of output 646 [2022-11-03 02:01:09,518 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:01:09,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-11-03 02:01:09,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-03 02:01:11,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:11,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:11,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:01:11,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:11,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:01:11,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:01:12,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:12,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:12,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:12,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:12,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:12,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:12,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:12,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:12,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:12,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:12,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:12,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:13,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:01:13,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:01:13,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:13,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:01:13,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:13,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:13,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:01:13,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:01:13,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:13,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:01:13,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:13,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:13,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:01:14,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:14,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:01:14,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:01:14,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:14,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:14,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:14,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:14,748 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:01:14,752 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:17,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2977#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:17,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:17,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:17,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 30 [2022-11-03 02:01:17,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231168586] [2022-11-03 02:01:17,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:17,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 02:01:17,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:17,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 02:01:17,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1874, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:01:17,096 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 9 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-03 02:01:20,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:20,382 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2022-11-03 02:01:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 02:01:20,383 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 9 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 56 [2022-11-03 02:01:20,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:20,385 INFO L225 Difference]: With dead ends: 141 [2022-11-03 02:01:20,385 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 02:01:20,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1000, Invalid=7742, Unknown=0, NotChecked=0, Total=8742 [2022-11-03 02:01:20,388 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 147 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 2019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:20,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 336 Invalid, 2019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:01:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 02:01:20,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 46. [2022-11-03 02:01:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 02:01:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-11-03 02:01:20,409 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 56 [2022-11-03 02:01:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:20,410 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-11-03 02:01:20,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 9 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-03 02:01:20,410 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-11-03 02:01:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 02:01:20,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:20,412 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:20,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:20,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:20,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:20,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:20,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2112540572, now seen corresponding path program 7 times [2022-11-03 02:01:20,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:20,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903607402] [2022-11-03 02:01:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:20,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:01:21,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:21,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903607402] [2022-11-03 02:01:21,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903607402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:21,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222162523] [2022-11-03 02:01:21,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:01:21,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:21,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:21,307 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:21,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:01:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:21,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:01:21,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:21,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:01:21,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:01:21,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 02:01:21,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:01:21,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-03 02:01:21,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:01:21,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-11-03 02:01:21,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-03 02:01:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:01:22,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:22,150 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:22,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:01:22,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2022-11-03 02:01:22,175 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 02:01:22,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2022-11-03 02:01:22,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2022-11-03 02:01:22,191 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:22,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-03 02:01:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:01:22,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222162523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:22,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61985407] [2022-11-03 02:01:22,375 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:01:22,375 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:22,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:22,375 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:22,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:22,437 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:01:22,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:01:22,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:01:22,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:01:22,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 124 [2022-11-03 02:01:22,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:01:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:22,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:22,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:22,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:22,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:22,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:22,930 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:01:22,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 796 treesize of output 819 [2022-11-03 02:01:22,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:22,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:22,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:22,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 607 treesize of output 594 [2022-11-03 02:01:23,118 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:01:23,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-11-03 02:01:23,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-03 02:01:25,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:25,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:25,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:01:25,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:25,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:01:25,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:01:26,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:26,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:26,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:26,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:26,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:26,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:26,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:26,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:26,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:26,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:26,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:26,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:26,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:01:26,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:26,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:01:26,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:01:27,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:27,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:27,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:01:27,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:27,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 154 [2022-11-03 02:01:27,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:01:27,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:27,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:27,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:01:27,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:01:27,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:27,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:01:28,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:28,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:28,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:28,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:28,453 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:01:28,454 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:30,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3739#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:30,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:30,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:30,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-11-03 02:01:30,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380964698] [2022-11-03 02:01:30,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:30,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:01:30,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:30,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:01:30,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:01:30,745 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 9 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-03 02:01:35,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:35,254 INFO L93 Difference]: Finished difference Result 172 states and 219 transitions. [2022-11-03 02:01:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-03 02:01:35,255 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 9 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 59 [2022-11-03 02:01:35,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:35,257 INFO L225 Difference]: With dead ends: 172 [2022-11-03 02:01:35,257 INFO L226 Difference]: Without dead ends: 170 [2022-11-03 02:01:35,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3645 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1311, Invalid=10899, Unknown=0, NotChecked=0, Total=12210 [2022-11-03 02:01:35,260 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 137 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:35,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 509 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:01:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-03 02:01:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 49. [2022-11-03 02:01:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 02:01:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-03 02:01:35,287 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 59 [2022-11-03 02:01:35,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:35,287 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-03 02:01:35,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 9 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-03 02:01:35,288 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-03 02:01:35,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:01:35,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:35,289 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:35,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:35,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:35,502 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:35,503 INFO L85 PathProgramCache]: Analyzing trace with hash -534898608, now seen corresponding path program 8 times [2022-11-03 02:01:35,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:35,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312968783] [2022-11-03 02:01:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:35,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:01:36,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:36,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312968783] [2022-11-03 02:01:36,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312968783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:36,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214211892] [2022-11-03 02:01:36,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:01:36,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:36,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:36,123 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:36,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:01:36,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 02:01:36,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:36,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:01:36,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:36,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 02:01:36,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:01:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:01:37,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:37,362 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:37,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:01:37,384 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:37,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-03 02:01:37,401 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:37,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2022-11-03 02:01:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:01:37,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214211892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:37,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500721524] [2022-11-03 02:01:37,642 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:01:37,643 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:37,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:37,643 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:37,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:37,699 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:01:37,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:01:37,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:01:37,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:01:37,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 97 [2022-11-03 02:01:37,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:01:38,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:38,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:38,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:38,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:38,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:38,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:38,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:38,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:38,204 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:01:38,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 808 treesize of output 831 [2022-11-03 02:01:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:38,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:38,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 673 treesize of output 654 [2022-11-03 02:01:38,511 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:01:38,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 496 [2022-11-03 02:01:38,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-03 02:01:40,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:40,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:40,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:01:41,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:01:41,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:41,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:01:41,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:41,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:41,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:41,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:41,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:41,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:41,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:41,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:42,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:42,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:42,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:42,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:42,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:01:42,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:01:42,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:42,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:01:42,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:42,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:42,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:01:42,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:42,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 154 [2022-11-03 02:01:42,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:01:43,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:43,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:43,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:01:43,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:01:43,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:43,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:01:43,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:43,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:43,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:43,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:43,933 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:01:43,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:46,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4601#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:46,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:46,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:46,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 33 [2022-11-03 02:01:46,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975837806] [2022-11-03 02:01:46,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:46,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 02:01:46,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 02:01:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2142, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 02:01:46,256 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 7 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 02:01:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:50,807 INFO L93 Difference]: Finished difference Result 215 states and 272 transitions. [2022-11-03 02:01:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-03 02:01:50,808 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 7 states have call predecessors, (24), 6 states have call successors, (24) Word has length 62 [2022-11-03 02:01:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:50,810 INFO L225 Difference]: With dead ends: 215 [2022-11-03 02:01:50,810 INFO L226 Difference]: Without dead ends: 213 [2022-11-03 02:01:50,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5464 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1625, Invalid=15145, Unknown=0, NotChecked=0, Total=16770 [2022-11-03 02:01:50,815 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 234 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 1006 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 2997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1006 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:50,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 359 Invalid, 2997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1006 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:01:50,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-03 02:01:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 52. [2022-11-03 02:01:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 02:01:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-11-03 02:01:50,857 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 62 [2022-11-03 02:01:50,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:50,859 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-11-03 02:01:50,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 7 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 02:01:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-11-03 02:01:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:01:50,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:50,861 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:50,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:51,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:01:51,071 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:51,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:51,071 INFO L85 PathProgramCache]: Analyzing trace with hash -830269212, now seen corresponding path program 9 times [2022-11-03 02:01:51,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:51,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449786360] [2022-11-03 02:01:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:51,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 78 proven. 33 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:01:51,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:51,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449786360] [2022-11-03 02:01:51,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449786360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:51,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502859413] [2022-11-03 02:01:51,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:01:51,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:51,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:51,628 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:51,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:01:51,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:01:51,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:01:51,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 100 proven. 11 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:01:52,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 100 proven. 11 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:01:52,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502859413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:52,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [116668373] [2022-11-03 02:01:52,824 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:01:52,824 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:52,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:52,825 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:52,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:52,883 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:01:52,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:01:52,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:01:53,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:01:53,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 93 [2022-11-03 02:01:53,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:01:53,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:53,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:53,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:53,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:53,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:53,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:53,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:53,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:53,386 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:01:53,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 797 treesize of output 820 [2022-11-03 02:01:53,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:53,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:53,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 680 treesize of output 661 [2022-11-03 02:01:53,696 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:01:53,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 524 [2022-11-03 02:01:53,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:56,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:56,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:56,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:01:56,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:56,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:01:56,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:01:56,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:56,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:56,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:56,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:56,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:56,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:57,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:57,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:57,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:57,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:57,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:57,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:57,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:01:57,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:57,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:01:57,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:01:57,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:57,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:57,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:01:57,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:01:57,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:57,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:01:58,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:58,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:58,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:01:58,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:01:58,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:01:58,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:01:58,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:58,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:58,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:58,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:59,110 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:01:59,112 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:01,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5588#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:01,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:01,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:01,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2022-11-03 02:02:01,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742320432] [2022-11-03 02:02:01,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:01,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:02:01,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:01,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:02:01,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=2650, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:02:01,362 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 02:02:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:02,336 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2022-11-03 02:02:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:02:02,336 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 65 [2022-11-03 02:02:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:02,337 INFO L225 Difference]: With dead ends: 99 [2022-11-03 02:02:02,337 INFO L226 Difference]: Without dead ends: 69 [2022-11-03 02:02:02,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=770, Invalid=4486, Unknown=0, NotChecked=0, Total=5256 [2022-11-03 02:02:02,339 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:02,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 96 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:02:02,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-03 02:02:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2022-11-03 02:02:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:02:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-11-03 02:02:02,369 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 65 [2022-11-03 02:02:02,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:02,369 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-11-03 02:02:02,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 02:02:02,370 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-11-03 02:02:02,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 02:02:02,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:02,371 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:02,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:02,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:02,583 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:02,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1040981489, now seen corresponding path program 10 times [2022-11-03 02:02:02,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:02,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831324442] [2022-11-03 02:02:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:02,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:02:04,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:04,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831324442] [2022-11-03 02:02:04,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831324442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:04,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638842635] [2022-11-03 02:02:04,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:02:04,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:04,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:04,283 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:04,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:02:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:04,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:02:04,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:04,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:02:04,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:02:04,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 02:02:04,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:02:04,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 02:02:04,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-11-03 02:02:04,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-03 02:02:04,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 02:02:04,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-11-03 02:02:04,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-11-03 02:02:04,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-03 02:02:04,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-03 02:02:04,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-03 02:02:04,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:02:04,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-03 02:02:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:02:05,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:05,506 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:05,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:02:05,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 40 [2022-11-03 02:02:05,533 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:05,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-03 02:02:05,553 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:05,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2022-11-03 02:02:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:02:05,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638842635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:05,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83060132] [2022-11-03 02:02:05,813 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:02:05,813 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:05,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:05,814 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:05,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:05,870 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:02:05,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:02:05,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:02:05,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:02:06,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2022-11-03 02:02:06,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:02:06,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:06,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:06,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:06,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:06,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:06,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:06,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:02:06,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:02:06,354 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:02:06,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 860 treesize of output 883 [2022-11-03 02:02:06,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:06,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:06,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:02:06,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 689 treesize of output 666 [2022-11-03 02:02:06,781 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:02:06,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 512 [2022-11-03 02:02:06,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:02:09,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:09,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:09,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:02:09,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:02:09,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:02:09,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:02:09,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:09,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:09,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:09,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:09,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:09,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:09,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:10,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:10,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:10,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:10,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:10,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:10,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:02:10,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:02:10,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:02:10,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:02:10,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:10,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:10,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:02:10,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:02:10,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 154 [2022-11-03 02:02:10,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:02:11,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:11,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:11,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:02:11,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:02:11,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:02:11,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:02:11,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:11,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:11,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:11,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:12,065 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:02:12,067 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:14,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6390#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:14,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:14,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:14,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 39 [2022-11-03 02:02:14,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088998607] [2022-11-03 02:02:14,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:14,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 02:02:14,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:14,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 02:02:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2743, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:02:14,547 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 12 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2022-11-03 02:02:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:22,063 INFO L93 Difference]: Finished difference Result 239 states and 300 transitions. [2022-11-03 02:02:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-03 02:02:22,063 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 12 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 82 [2022-11-03 02:02:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:22,065 INFO L225 Difference]: With dead ends: 239 [2022-11-03 02:02:22,065 INFO L226 Difference]: Without dead ends: 237 [2022-11-03 02:02:22,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 206 SyntacticMatches, 5 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7078 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2035, Invalid=20315, Unknown=0, NotChecked=0, Total=22350 [2022-11-03 02:02:22,069 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 226 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 2958 mSolverCounterSat, 978 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 3936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 978 IncrementalHoareTripleChecker+Valid, 2958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:22,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 716 Invalid, 3936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [978 Valid, 2958 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:02:22,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-03 02:02:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 64. [2022-11-03 02:02:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:02:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2022-11-03 02:02:22,106 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 82 [2022-11-03 02:02:22,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:22,106 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2022-11-03 02:02:22,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 12 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2022-11-03 02:02:22,106 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2022-11-03 02:02:22,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 02:02:22,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:22,109 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:22,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:22,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:22,315 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:22,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:22,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2073812061, now seen corresponding path program 11 times [2022-11-03 02:02:22,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:22,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895745768] [2022-11-03 02:02:22,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:22,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:02:23,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895745768] [2022-11-03 02:02:23,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895745768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421962846] [2022-11-03 02:02:23,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:02:23,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:23,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:23,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:23,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:02:24,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-03 02:02:24,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:24,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:02:24,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:24,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:02:24,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 02:02:24,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:02:40,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 02:02:40,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-11-03 02:02:40,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-03 02:02:56,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-03 02:02:56,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:02:56,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-11-03 02:02:56,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-03 02:02:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 40 proven. 156 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-03 02:02:57,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:59,758 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:59,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:02:59,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 40 [2022-11-03 02:02:59,781 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:59,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-03 02:02:59,798 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:59,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2022-11-03 02:03:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:03:00,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421962846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510282479] [2022-11-03 02:03:00,075 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:03:00,075 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:03:00,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:03:00,076 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:03:00,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:03:00,136 INFO L356 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-03 02:03:00,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-03 02:03:00,188 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:03:00,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:03:00,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:03:00,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:00,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2022-11-03 02:03:00,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:03:00,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:00,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:00,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:00,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:00,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:00,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:00,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:00,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:00,713 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:03:00,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 827 treesize of output 850 [2022-11-03 02:03:00,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:00,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:00,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:00,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 710 treesize of output 687 [2022-11-03 02:03:01,126 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:03:01,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 496 [2022-11-03 02:03:01,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-03 02:03:03,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:03,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:03,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:03:03,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:03:03,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:03:03,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:03:03,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:03,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:04,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:04,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:04,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:04,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:04,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:04,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:04,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:04,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:04,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:04,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:04,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:03:04,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:03:04,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:03:04,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:03:05,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:05,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:05,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:03:05,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:03:05,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 154 [2022-11-03 02:03:05,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:03:05,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:05,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:05,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:03:05,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:03:05,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:03:05,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:03:06,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:06,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:06,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:06,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:06,423 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:03:06,425 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:03:19,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7579#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:03:19,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:03:19,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:03:19,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 42 [2022-11-03 02:03:19,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913100061] [2022-11-03 02:03:19,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:19,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:03:19,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:19,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:03:19,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=3035, Unknown=14, NotChecked=0, Total=3306 [2022-11-03 02:03:19,014 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 42 states, 42 states have (on average 2.857142857142857) internal successors, (120), 41 states have internal predecessors, (120), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) [2022-11-03 02:03:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:37,869 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2022-11-03 02:03:37,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:03:37,870 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.857142857142857) internal successors, (120), 41 states have internal predecessors, (120), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) Word has length 85 [2022-11-03 02:03:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:37,872 INFO L225 Difference]: With dead ends: 171 [2022-11-03 02:03:37,872 INFO L226 Difference]: Without dead ends: 169 [2022-11-03 02:03:37,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 210 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 64.3s TimeCoverageRelationStatistics Valid=500, Invalid=5798, Unknown=22, NotChecked=0, Total=6320 [2022-11-03 02:03:37,873 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 49 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 2790 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:37,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 642 Invalid, 3066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2790 Invalid, 0 Unknown, 67 Unchecked, 2.0s Time] [2022-11-03 02:03:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-03 02:03:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 132. [2022-11-03 02:03:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 89 states have (on average 1.101123595505618) internal successors, (98), 89 states have internal predecessors, (98), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 02:03:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 178 transitions. [2022-11-03 02:03:37,993 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 178 transitions. Word has length 85 [2022-11-03 02:03:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:37,994 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 178 transitions. [2022-11-03 02:03:37,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.857142857142857) internal successors, (120), 41 states have internal predecessors, (120), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) [2022-11-03 02:03:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 178 transitions. [2022-11-03 02:03:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:03:37,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:37,996 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:38,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:38,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:03:38,203 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2120030031, now seen corresponding path program 12 times [2022-11-03 02:03:38,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:38,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203548792] [2022-11-03 02:03:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:38,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:03:39,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:39,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203548792] [2022-11-03 02:03:39,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203548792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:39,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034446870] [2022-11-03 02:03:39,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:03:39,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:39,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:39,299 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:39,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:03:39,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:03:39,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:03:39,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:03:39,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:39,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:03:39,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:03:39,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:03:39,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-03 02:03:39,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-03 02:03:39,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:03:39,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-03 02:03:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:03:40,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:40,758 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:03:40,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:03:40,783 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:03:40,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-03 02:03:40,818 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:03:40,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 39 [2022-11-03 02:03:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:03:41,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034446870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:41,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803396106] [2022-11-03 02:03:41,135 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:03:41,135 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:03:41,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:03:41,135 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:03:41,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:03:41,205 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:03:41,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:03:41,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:03:41,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:03:41,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 96 [2022-11-03 02:03:41,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:03:41,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:41,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:41,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:41,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:41,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:41,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:41,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:41,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:41,729 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:03:41,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 834 treesize of output 857 [2022-11-03 02:03:41,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:41,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:41,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:41,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 681 treesize of output 660 [2022-11-03 02:03:41,991 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:03:41,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-11-03 02:03:42,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-03 02:03:44,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:44,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:44,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:03:44,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:03:44,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:03:44,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:03:44,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:44,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:44,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:44,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:45,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:03:45,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:03:45,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:03:45,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:03:45,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:45,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:45,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:03:45,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:03:45,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 154 [2022-11-03 02:03:45,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:03:45,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:45,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:45,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:03:45,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:03:45,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:03:45,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:03:46,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:46,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:46,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:46,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:46,750 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:03:46,756 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:03:49,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8650#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:03:49,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:03:49,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:03:49,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 45 [2022-11-03 02:03:49,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980453758] [2022-11-03 02:03:49,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:49,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-03 02:03:49,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:49,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-03 02:03:49,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 02:03:49,495 INFO L87 Difference]: Start difference. First operand 132 states and 178 transitions. Second operand has 45 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 44 states have internal predecessors, (127), 12 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) [2022-11-03 02:04:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:03,582 INFO L93 Difference]: Finished difference Result 364 states and 439 transitions. [2022-11-03 02:04:03,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-11-03 02:04:03,583 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 44 states have internal predecessors, (127), 12 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) Word has length 88 [2022-11-03 02:04:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:03,585 INFO L225 Difference]: With dead ends: 364 [2022-11-03 02:04:03,585 INFO L226 Difference]: Without dead ends: 362 [2022-11-03 02:04:03,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16809 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=3754, Invalid=43988, Unknown=0, NotChecked=0, Total=47742 [2022-11-03 02:04:03,591 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 317 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 4093 mSolverCounterSat, 1423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 5516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1423 IncrementalHoareTripleChecker+Valid, 4093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:03,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 780 Invalid, 5516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1423 Valid, 4093 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-03 02:04:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-03 02:04:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 164. [2022-11-03 02:04:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 121 states have (on average 1.0826446280991735) internal successors, (131), 121 states have internal predecessors, (131), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 02:04:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 211 transitions. [2022-11-03 02:04:03,715 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 211 transitions. Word has length 88 [2022-11-03 02:04:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:03,716 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 211 transitions. [2022-11-03 02:04:03,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 44 states have internal predecessors, (127), 12 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) [2022-11-03 02:04:03,716 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 211 transitions. [2022-11-03 02:04:03,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 02:04:03,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:03,717 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:03,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:03,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:04:03,918 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash -315072285, now seen corresponding path program 13 times [2022-11-03 02:04:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:03,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587000820] [2022-11-03 02:04:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:04:04,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:04,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587000820] [2022-11-03 02:04:04,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587000820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:04,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886717722] [2022-11-03 02:04:04,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:04:04,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:04,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:04,859 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:04,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:04:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:05,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:04:05,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:05,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 02:04:05,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:04:05,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 02:04:05,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:04:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:04:05,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:06,073 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:06,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:04:06,100 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:06,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-03 02:04:06,118 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:06,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2022-11-03 02:04:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:04:06,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886717722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:06,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1551149601] [2022-11-03 02:04:06,442 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:04:06,442 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:04:06,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:04:06,443 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:04:06,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:04:06,514 INFO L356 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-03 02:04:06,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-03 02:04:06,567 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:04:06,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:04:06,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:04:06,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 115 [2022-11-03 02:04:06,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:04:07,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:07,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:07,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:07,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:07,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:07,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:04:07,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:04:07,048 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:04:07,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 800 treesize of output 823 [2022-11-03 02:04:07,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:04:07,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 629 treesize of output 614 [2022-11-03 02:04:07,297 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:04:07,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 504 [2022-11-03 02:04:07,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-03 02:04:09,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:09,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:09,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:04:09,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:09,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:04:09,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:04:10,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:10,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:10,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:10,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:10,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:10,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:10,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:10,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:10,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:10,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:10,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:10,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:11,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:04:11,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:04:11,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:11,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:04:11,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:11,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:11,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:04:11,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:04:11,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:11,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:04:11,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:11,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:11,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:04:11,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:12,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:04:12,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:04:12,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:12,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:12,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:12,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:12,726 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:04:12,728 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:04:15,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10325#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:04:15,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:04:15,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:04:15,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 44 [2022-11-03 02:04:15,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495734727] [2022-11-03 02:04:15,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:15,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:04:15,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:15,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:04:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3296, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 02:04:15,549 INFO L87 Difference]: Start difference. First operand 164 states and 211 transitions. Second operand has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 9 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 10 states have call predecessors, (36), 9 states have call successors, (36) [2022-11-03 02:04:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:31,651 INFO L93 Difference]: Finished difference Result 381 states and 461 transitions. [2022-11-03 02:04:31,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-11-03 02:04:31,654 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 9 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 10 states have call predecessors, (36), 9 states have call successors, (36) Word has length 91 [2022-11-03 02:04:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:31,657 INFO L225 Difference]: With dead ends: 381 [2022-11-03 02:04:31,657 INFO L226 Difference]: Without dead ends: 379 [2022-11-03 02:04:31,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18214 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=3871, Invalid=47885, Unknown=0, NotChecked=0, Total=51756 [2022-11-03 02:04:31,662 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 345 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 5320 mSolverCounterSat, 1657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 6977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1657 IncrementalHoareTripleChecker+Valid, 5320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:31,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 860 Invalid, 6977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1657 Valid, 5320 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-03 02:04:31,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-03 02:04:31,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 167. [2022-11-03 02:04:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 124 states have (on average 1.0806451612903225) internal successors, (134), 124 states have internal predecessors, (134), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 02:04:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 214 transitions. [2022-11-03 02:04:31,769 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 214 transitions. Word has length 91 [2022-11-03 02:04:31,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:31,769 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 214 transitions. [2022-11-03 02:04:31,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 9 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 10 states have call predecessors, (36), 9 states have call successors, (36) [2022-11-03 02:04:31,770 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 214 transitions. [2022-11-03 02:04:31,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:04:31,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:31,771 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:31,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:31,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:04:31,995 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:31,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:31,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1809407119, now seen corresponding path program 14 times [2022-11-03 02:04:31,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:31,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348073161] [2022-11-03 02:04:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:31,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 188 proven. 64 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:04:32,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:32,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348073161] [2022-11-03 02:04:32,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348073161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:32,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878225916] [2022-11-03 02:04:32,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:04:32,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:32,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:32,875 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:32,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:04:35,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-03 02:04:35,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:04:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:04:35,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 222 proven. 30 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:04:36,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 222 proven. 30 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:04:36,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878225916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:36,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195833196] [2022-11-03 02:04:36,917 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:04:36,917 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:04:36,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:04:36,918 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:04:36,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:04:36,982 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:04:36,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:04:37,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:04:37,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:04:37,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2022-11-03 02:04:37,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:04:37,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:37,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:37,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:37,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:04:37,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:04:37,524 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:04:37,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 827 treesize of output 850 [2022-11-03 02:04:37,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:37,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:04:37,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 710 treesize of output 687 [2022-11-03 02:04:37,963 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:04:37,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-11-03 02:04:37,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-03 02:04:40,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:40,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:40,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:04:40,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:40,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:04:40,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:04:40,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:40,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:40,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:40,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:41,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:41,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:41,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:41,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:41,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:41,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:41,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:41,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:41,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:04:41,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:41,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:04:41,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:04:41,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:41,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:42,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:04:42,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:42,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 154 [2022-11-03 02:04:42,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:04:42,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:42,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:42,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:04:42,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:04:42,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:42,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:04:42,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:42,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:43,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:43,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:43,298 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:04:43,300 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:04:45,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12079#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:04:45,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:04:45,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:04:45,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 19] total 56 [2022-11-03 02:04:45,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136594706] [2022-11-03 02:04:45,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:45,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 02:04:45,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 02:04:45,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=4284, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 02:04:45,988 INFO L87 Difference]: Start difference. First operand 167 states and 214 transitions. Second operand has 56 states, 56 states have (on average 3.0357142857142856) internal successors, (170), 56 states have internal predecessors, (170), 9 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-11-03 02:04:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:46,817 INFO L93 Difference]: Finished difference Result 209 states and 256 transitions. [2022-11-03 02:04:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 02:04:46,818 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0357142857142856) internal successors, (170), 56 states have internal predecessors, (170), 9 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 94 [2022-11-03 02:04:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:46,819 INFO L225 Difference]: With dead ends: 209 [2022-11-03 02:04:46,819 INFO L226 Difference]: Without dead ends: 167 [2022-11-03 02:04:46,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=988, Invalid=5174, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 02:04:46,821 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 173 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:46,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 124 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:04:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-03 02:04:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-11-03 02:04:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 124 states have (on average 1.0725806451612903) internal successors, (133), 124 states have internal predecessors, (133), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 02:04:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2022-11-03 02:04:46,970 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 94 [2022-11-03 02:04:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:46,971 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2022-11-03 02:04:46,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0357142857142856) internal successors, (170), 56 states have internal predecessors, (170), 9 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-11-03 02:04:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2022-11-03 02:04:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 02:04:46,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:46,974 INFO L195 NwaCegarLoop]: trace histogram [16, 13, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:47,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:47,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:04:47,190 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:47,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:47,191 INFO L85 PathProgramCache]: Analyzing trace with hash -983796348, now seen corresponding path program 15 times [2022-11-03 02:04:47,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:47,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971668239] [2022-11-03 02:04:47,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:47,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-03 02:04:49,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:49,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971668239] [2022-11-03 02:04:49,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971668239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:49,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411439051] [2022-11-03 02:04:49,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:04:49,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:49,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:49,600 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:49,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:04:49,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:04:49,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:04:49,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 02:04:49,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:50,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:04:50,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 02:04:50,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:04:50,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:04:50,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 02:04:50,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2022-11-03 02:04:50,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-11-03 02:04:50,221 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:50,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 20 [2022-11-03 02:04:50,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 02:04:50,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2022-11-03 02:04:50,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-11-03 02:04:50,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-03 02:04:50,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-03 02:04:50,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:04:50,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2022-11-03 02:04:50,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:04:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-03 02:04:51,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:51,829 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:51,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:04:51,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 40 [2022-11-03 02:04:51,854 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:51,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-03 02:04:51,887 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:51,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 39 [2022-11-03 02:04:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-03 02:04:52,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411439051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:52,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1729666391] [2022-11-03 02:04:52,270 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:04:52,270 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:04:52,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:04:52,271 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:04:52,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:04:52,338 INFO L356 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-03 02:04:52,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-03 02:04:52,392 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:04:52,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:04:52,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:04:52,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:52,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:52,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2022-11-03 02:04:52,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:04:52,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:52,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:52,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:52,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:52,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:52,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:52,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:04:52,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:04:52,895 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:04:52,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 827 treesize of output 850 [2022-11-03 02:04:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:52,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:04:52,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 710 treesize of output 687 [2022-11-03 02:04:53,258 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:04:53,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 512 [2022-11-03 02:04:53,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:55,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:55,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:55,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:04:55,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:04:55,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:55,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:04:56,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:56,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:56,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:56,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:56,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:56,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:56,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:56,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:56,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:56,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:56,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:56,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:57,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:04:57,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:57,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:04:57,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:04:57,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:57,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:57,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:04:57,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:04:57,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:57,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:04:57,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:57,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:57,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:04:57,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:04:57,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:04:57,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:04:58,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:58,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:58,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:58,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:58,697 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:04:58,699 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:05:01,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13373#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:05:01,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:05:01,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:05:01,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 62 [2022-11-03 02:05:01,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325297185] [2022-11-03 02:05:01,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:05:01,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-03 02:05:01,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:01,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-03 02:05:01,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=5681, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 02:05:01,743 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand has 62 states, 62 states have (on average 2.9838709677419355) internal successors, (185), 61 states have internal predecessors, (185), 15 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) [2022-11-03 02:05:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:27,632 INFO L93 Difference]: Finished difference Result 416 states and 500 transitions. [2022-11-03 02:05:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-11-03 02:05:27,633 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.9838709677419355) internal successors, (185), 61 states have internal predecessors, (185), 15 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) Word has length 111 [2022-11-03 02:05:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:27,634 INFO L225 Difference]: With dead ends: 416 [2022-11-03 02:05:27,635 INFO L226 Difference]: Without dead ends: 414 [2022-11-03 02:05:27,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 274 SyntacticMatches, 6 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22181 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=4731, Invalid=64701, Unknown=0, NotChecked=0, Total=69432 [2022-11-03 02:05:27,640 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 436 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 7795 mSolverCounterSat, 1912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 9707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1912 IncrementalHoareTripleChecker+Valid, 7795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:27,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 1273 Invalid, 9707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1912 Valid, 7795 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-03 02:05:27,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-03 02:05:27,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 170. [2022-11-03 02:05:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.0708661417322836) internal successors, (136), 127 states have internal predecessors, (136), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 02:05:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 216 transitions. [2022-11-03 02:05:27,766 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 216 transitions. Word has length 111 [2022-11-03 02:05:27,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:27,766 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 216 transitions. [2022-11-03 02:05:27,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.9838709677419355) internal successors, (185), 61 states have internal predecessors, (185), 15 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) [2022-11-03 02:05:27,766 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 216 transitions. [2022-11-03 02:05:27,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:05:27,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:27,767 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:27,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:27,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:05:27,978 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:27,979 INFO L85 PathProgramCache]: Analyzing trace with hash 585318192, now seen corresponding path program 16 times [2022-11-03 02:05:27,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:27,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567719393] [2022-11-03 02:05:27,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:27,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-03 02:05:30,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:30,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567719393] [2022-11-03 02:05:30,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567719393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:30,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449274418] [2022-11-03 02:05:30,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:05:30,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:30,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:30,169 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:30,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:05:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:30,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 02:05:30,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:30,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:05:30,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 02:05:30,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:05:30,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:05:30,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 02:05:30,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2022-11-03 02:05:30,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-11-03 02:05:30,753 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:05:30,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 20 [2022-11-03 02:05:30,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-03 02:05:30,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:05:30,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-03 02:05:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-03 02:05:31,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:32,289 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:05:32,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:05:32,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2022-11-03 02:05:32,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2022-11-03 02:05:32,326 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 02:05:32,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2022-11-03 02:05:32,334 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:05:32,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-03 02:05:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-03 02:05:32,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449274418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:32,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [442332244] [2022-11-03 02:05:32,668 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:05:32,668 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:05:32,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:05:32,669 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:05:32,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:05:32,739 INFO L356 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-03 02:05:32,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-03 02:05:32,800 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:05:32,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:05:32,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:05:32,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:05:32,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 124 [2022-11-03 02:05:32,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:05:33,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:05:33,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:05:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:05:33,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:05:33,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:05:33,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:05:33,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:05:33,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:05:33,302 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:05:33,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 796 treesize of output 819 [2022-11-03 02:05:33,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:05:33,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:05:33,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 607 treesize of output 594 [2022-11-03 02:05:33,571 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:05:33,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 504 [2022-11-03 02:05:33,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-03 02:05:36,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:36,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:36,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:05:36,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:05:36,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:05:36,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:05:36,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:36,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:36,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:36,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:36,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:36,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:37,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:37,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:37,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:37,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:37,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:37,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:37,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:05:37,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:05:37,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:05:37,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:05:37,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:37,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:37,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:05:37,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:05:37,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 154 [2022-11-03 02:05:37,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:05:38,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:38,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:38,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:05:38,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:05:38,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:05:38,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:05:38,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:38,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:38,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:38,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:05:39,152 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:05:39,154 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:05:42,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15344#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:05:42,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:05:42,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:05:42,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 65 [2022-11-03 02:05:42,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466725384] [2022-11-03 02:05:42,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:05:42,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-03 02:05:42,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-03 02:05:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=6126, Unknown=0, NotChecked=0, Total=6480 [2022-11-03 02:05:42,159 INFO L87 Difference]: Start difference. First operand 170 states and 216 transitions. Second operand has 65 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 64 states have internal predecessors, (194), 15 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 16 states have call predecessors, (48), 15 states have call successors, (48) [2022-11-03 02:06:11,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:11,850 INFO L93 Difference]: Finished difference Result 479 states and 573 transitions. [2022-11-03 02:06:11,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-11-03 02:06:11,851 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 64 states have internal predecessors, (194), 15 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 16 states have call predecessors, (48), 15 states have call successors, (48) Word has length 114 [2022-11-03 02:06:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:11,852 INFO L225 Difference]: With dead ends: 479 [2022-11-03 02:06:11,853 INFO L226 Difference]: Without dead ends: 477 [2022-11-03 02:06:11,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 283 SyntacticMatches, 5 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28780 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=5450, Invalid=81870, Unknown=0, NotChecked=0, Total=87320 [2022-11-03 02:06:11,860 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 473 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 8556 mSolverCounterSat, 2183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 10739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2183 IncrementalHoareTripleChecker+Valid, 8556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:11,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1275 Invalid, 10739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2183 Valid, 8556 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-03 02:06:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-11-03 02:06:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 173. [2022-11-03 02:06:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 130 states have (on average 1.0692307692307692) internal successors, (139), 130 states have internal predecessors, (139), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 02:06:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 219 transitions. [2022-11-03 02:06:11,983 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 219 transitions. Word has length 114 [2022-11-03 02:06:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:11,983 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 219 transitions. [2022-11-03 02:06:11,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 64 states have internal predecessors, (194), 15 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 16 states have call predecessors, (48), 15 states have call successors, (48) [2022-11-03 02:06:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 219 transitions. [2022-11-03 02:06:11,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 02:06:11,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:11,985 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:12,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:12,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:06:12,189 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:12,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:12,189 INFO L85 PathProgramCache]: Analyzing trace with hash -347470332, now seen corresponding path program 17 times [2022-11-03 02:06:12,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:12,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204939158] [2022-11-03 02:06:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:12,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-03 02:06:13,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:13,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204939158] [2022-11-03 02:06:13,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204939158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:13,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758126928] [2022-11-03 02:06:13,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:06:13,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:13,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:13,559 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:13,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:06:27,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-03 02:06:27,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 02:06:27,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:27,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:06:27,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:06:54,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-03 02:06:54,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-03 02:06:54,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-03 02:06:54,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:06:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 30 proven. 359 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-03 02:06:55,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:57,497 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:06:57,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:06:57,523 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:06:57,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-03 02:06:57,542 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:06:57,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2022-11-03 02:06:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-03 02:06:57,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758126928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:57,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116245839] [2022-11-03 02:06:57,948 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:06:57,948 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:06:57,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:06:57,949 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:06:57,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:06:58,004 INFO L356 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-03 02:06:58,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-03 02:06:58,061 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:06:58,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:06:58,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:06:58,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 110 [2022-11-03 02:06:58,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:06:58,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:58,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:58,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:58,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:58,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:58,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:06:58,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:06:58,540 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:06:58,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 815 treesize of output 838 [2022-11-03 02:06:58,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:06:58,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 644 treesize of output 627 [2022-11-03 02:06:58,771 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:06:58,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 504 [2022-11-03 02:06:58,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-03 02:07:01,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:01,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:01,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:07:01,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:07:01,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:07:01,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:07:01,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:01,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:01,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:01,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:02,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:02,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:02,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:02,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:02,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:02,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:02,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:02,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:02,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:07:02,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:07:02,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-11-03 02:07:02,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:07:02,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:02,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:03,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:07:03,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:07:03,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 154 [2022-11-03 02:07:03,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:07:03,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:03,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:03,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:07:03,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:07:03,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:07:03,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:07:03,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:03,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:04,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:04,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:07:04,315 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:07:04,317 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:07:15,917 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17474#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:07:15,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:07:15,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:07:15,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 25] total 56 [2022-11-03 02:07:15,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540776117] [2022-11-03 02:07:15,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:15,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 02:07:15,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 02:07:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=4746, Unknown=19, NotChecked=0, Total=5112 [2022-11-03 02:07:15,919 INFO L87 Difference]: Start difference. First operand 173 states and 219 transitions. Second operand has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 55 states have internal predecessors, (165), 15 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 16 states have call predecessors, (48), 15 states have call successors, (48) [2022-11-03 02:08:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:16,021 INFO L93 Difference]: Finished difference Result 276 states and 323 transitions. [2022-11-03 02:08:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-03 02:08:16,022 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 55 states have internal predecessors, (165), 15 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 16 states have call predecessors, (48), 15 states have call successors, (48) Word has length 117 [2022-11-03 02:08:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:16,023 INFO L225 Difference]: With dead ends: 276 [2022-11-03 02:08:16,023 INFO L226 Difference]: Without dead ends: 274 [2022-11-03 02:08:16,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 317 SyntacticMatches, 15 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8798 ImplicationChecksByTransitivity, 98.9s TimeCoverageRelationStatistics Valid=1590, Invalid=22544, Unknown=46, NotChecked=0, Total=24180 [2022-11-03 02:08:16,026 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 175 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 2933 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 3552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 2933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:16,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 808 Invalid, 3552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 2933 Invalid, 0 Unknown, 130 Unchecked, 2.2s Time] [2022-11-03 02:08:16,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-03 02:08:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 181. [2022-11-03 02:08:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 137 states have internal predecessors, (146), 40 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 02:08:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2022-11-03 02:08:16,164 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 117 [2022-11-03 02:08:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:16,165 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2022-11-03 02:08:16,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 55 states have internal predecessors, (165), 15 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 16 states have call predecessors, (48), 15 states have call successors, (48) [2022-11-03 02:08:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2022-11-03 02:08:16,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:08:16,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:16,166 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:16,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:16,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:16,368 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:16,368 INFO L85 PathProgramCache]: Analyzing trace with hash 535377540, now seen corresponding path program 18 times [2022-11-03 02:08:16,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:16,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25210345] [2022-11-03 02:08:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:16,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 346 proven. 104 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-03 02:08:17,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:17,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25210345] [2022-11-03 02:08:17,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25210345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:17,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053725601] [2022-11-03 02:08:17,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:08:17,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:17,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:17,621 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:17,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:08:17,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:08:17,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:08:17,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:08:17,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 392 proven. 58 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-03 02:08:19,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 392 proven. 58 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-03 02:08:20,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053725601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:20,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060018127] [2022-11-03 02:08:20,151 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 02:08:20,152 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:08:20,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:08:20,152 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:08:20,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:08:20,213 INFO L356 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-03 02:08:20,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-03 02:08:20,265 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:08:20,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:08:20,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-03 02:08:20,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 118 [2022-11-03 02:08:20,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-03 02:08:20,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:20,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:20,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:20,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:20,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:20,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:08:20,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:08:20,812 INFO L356 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-03 02:08:20,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 837 treesize of output 860 [2022-11-03 02:08:20,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:20,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:08:20,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 630 treesize of output 613 [2022-11-03 02:08:21,157 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:08:21,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-11-03 02:08:21,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-03 02:08:23,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:23,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:23,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 137 [2022-11-03 02:08:23,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:08:23,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 124 [2022-11-03 02:08:23,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 82 [2022-11-03 02:08:24,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:24,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:24,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:24,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:24,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:24,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:24,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:24,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:24,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:24,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:24,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:24,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:24,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:08:24,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:08:24,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:08:24,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:08:25,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:25,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:25,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 167 [2022-11-03 02:08:25,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:08:25,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 154 [2022-11-03 02:08:25,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 112 [2022-11-03 02:08:25,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:25,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:25,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:08:25,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 02:08:25,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-03 02:08:25,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 70 [2022-11-03 02:08:26,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:26,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:26,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:26,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:26,579 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-03 02:08:26,581 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:08:29,468 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19138#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem13#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:08:29,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:08:29,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:08:29,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 24] total 70 [2022-11-03 02:08:29,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638853483] [2022-11-03 02:08:29,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:29,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-03 02:08:29,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-03 02:08:29,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1246, Invalid=6064, Unknown=0, NotChecked=0, Total=7310 [2022-11-03 02:08:29,470 INFO L87 Difference]: Start difference. First operand 181 states and 226 transitions. Second operand has 70 states, 70 states have (on average 3.142857142857143) internal successors, (220), 70 states have internal predecessors, (220), 12 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2022-11-03 02:08:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:30,532 INFO L93 Difference]: Finished difference Result 247 states and 292 transitions. [2022-11-03 02:08:30,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:08:30,533 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.142857142857143) internal successors, (220), 70 states have internal predecessors, (220), 12 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) Word has length 123 [2022-11-03 02:08:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:30,534 INFO L225 Difference]: With dead ends: 247 [2022-11-03 02:08:30,534 INFO L226 Difference]: Without dead ends: 193 [2022-11-03 02:08:30,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3724 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1451, Invalid=7291, Unknown=0, NotChecked=0, Total=8742 [2022-11-03 02:08:30,537 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 149 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:30,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 149 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:08:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-03 02:08:30,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 178. [2022-11-03 02:08:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 134 states have (on average 1.0597014925373134) internal successors, (142), 134 states have internal predecessors, (142), 40 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 02:08:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 222 transitions. [2022-11-03 02:08:30,744 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 222 transitions. Word has length 123 [2022-11-03 02:08:30,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:30,744 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 222 transitions. [2022-11-03 02:08:30,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.142857142857143) internal successors, (220), 70 states have internal predecessors, (220), 12 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2022-11-03 02:08:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 222 transitions. [2022-11-03 02:08:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:08:30,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:30,746 INFO L195 NwaCegarLoop]: trace histogram [20, 16, 15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:30,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:30,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-03 02:08:30,974 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:30,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:30,975 INFO L85 PathProgramCache]: Analyzing trace with hash 87912195, now seen corresponding path program 19 times [2022-11-03 02:08:30,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:30,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544900831] [2022-11-03 02:08:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:30,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:32,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 02:08:32,189 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkInductivity(InterpolantChecker.java:409) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:383) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:154) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:848) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:773) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:343) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:343) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:198) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:296) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:08:32,194 INFO L158 Benchmark]: Toolchain (without parser) took 526144.93ms. Allocated memory was 94.4MB in the beginning and 937.4MB in the end (delta: 843.1MB). Free memory was 58.4MB in the beginning and 830.2MB in the end (delta: -771.8MB). Peak memory consumption was 610.0MB. Max. memory is 16.1GB. [2022-11-03 02:08:32,194 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory was 74.6MB in the beginning and 74.5MB in the end (delta: 46.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:08:32,194 INFO L158 Benchmark]: CACSL2BoogieTranslator took 423.55ms. Allocated memory is still 94.4MB. Free memory was 58.2MB in the beginning and 69.6MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:08:32,195 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.02ms. Allocated memory is still 94.4MB. Free memory was 69.6MB in the beginning and 67.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:08:32,195 INFO L158 Benchmark]: Boogie Preprocessor took 53.53ms. Allocated memory is still 94.4MB. Free memory was 67.8MB in the beginning and 66.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:08:32,195 INFO L158 Benchmark]: RCFGBuilder took 569.65ms. Allocated memory is still 94.4MB. Free memory was 66.2MB in the beginning and 49.8MB in the end (delta: 16.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:08:32,196 INFO L158 Benchmark]: TraceAbstraction took 525016.20ms. Allocated memory was 94.4MB in the beginning and 937.4MB in the end (delta: 843.1MB). Free memory was 49.2MB in the beginning and 830.2MB in the end (delta: -781.0MB). Peak memory consumption was 602.1MB. Max. memory is 16.1GB. [2022-11-03 02:08:32,196 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory was 74.6MB in the beginning and 74.5MB in the end (delta: 46.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 423.55ms. Allocated memory is still 94.4MB. Free memory was 58.2MB in the beginning and 69.6MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.02ms. Allocated memory is still 94.4MB. Free memory was 69.6MB in the beginning and 67.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.53ms. Allocated memory is still 94.4MB. Free memory was 67.8MB in the beginning and 66.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 569.65ms. Allocated memory is still 94.4MB. Free memory was 66.2MB in the beginning and 49.8MB in the end (delta: 16.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 525016.20ms. Allocated memory was 94.4MB in the beginning and 937.4MB in the end (delta: 843.1MB). Free memory was 49.2MB in the beginning and 830.2MB in the end (delta: -781.0MB). Peak memory consumption was 602.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: null: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkInductivity(InterpolantChecker.java:409) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:08:32,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI --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 c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:08:34,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:08:34,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:08:34,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:08:34,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:08:34,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:08:34,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:08:34,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:08:34,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:08:34,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:08:34,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:08:34,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:08:34,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:08:34,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:08:34,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:08:34,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:08:34,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:08:34,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:08:34,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:08:34,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:08:34,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:08:34,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:08:34,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:08:34,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:08:34,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:08:34,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:08:34,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:08:34,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:08:34,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:08:34,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:08:34,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:08:34,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:08:34,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:08:34,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:08:34,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:08:34,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:08:34,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:08:34,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:08:34,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:08:34,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:08:34,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:08:34,808 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:08:34,829 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:08:34,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:08:34,833 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:08:34,834 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:08:34,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:08:34,835 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:08:34,835 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:08:34,835 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:08:34,836 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:08:34,836 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:08:34,837 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:08:34,837 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:08:34,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:08:34,839 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:08:34,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:08:34,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:08:34,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:08:34,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:08:34,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:08:34,840 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:08:34,841 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:08:34,841 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:08:34,841 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:08:34,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:08:34,841 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:08:34,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:08:34,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:08:34,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:08:34,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:08:34,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:08:34,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:08:34,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:08:34,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:08:34,844 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:08:34,844 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:34,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:08:34,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:08:34,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:08:34,845 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 [2022-11-03 02:08:35,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:08:35,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:08:35,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:08:35,300 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:08:35,301 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:08:35,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-tiling/pnr4.c [2022-11-03 02:08:35,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/data/a62497602/01ad43dfdd8147229cebf34130198be0/FLAG8ad68eacf [2022-11-03 02:08:35,978 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:08:35,978 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/sv-benchmarks/c/array-tiling/pnr4.c [2022-11-03 02:08:35,986 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/data/a62497602/01ad43dfdd8147229cebf34130198be0/FLAG8ad68eacf [2022-11-03 02:08:36,327 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/data/a62497602/01ad43dfdd8147229cebf34130198be0 [2022-11-03 02:08:36,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:08:36,331 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:08:36,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:08:36,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:08:36,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:08:36,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b986fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36, skipping insertion in model container [2022-11-03 02:08:36,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:08:36,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:08:36,505 WARN L230 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_a20a4a64-71b6-4ccb-9295-648d90af2a95/sv-benchmarks/c/array-tiling/pnr4.c[395,408] [2022-11-03 02:08:36,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:08:36,606 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:08:36,633 WARN L230 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_a20a4a64-71b6-4ccb-9295-648d90af2a95/sv-benchmarks/c/array-tiling/pnr4.c[395,408] [2022-11-03 02:08:36,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:08:36,683 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:08:36,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36 WrapperNode [2022-11-03 02:08:36,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:08:36,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:08:36,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:08:36,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:08:36,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,753 INFO L138 Inliner]: procedures = 19, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 86 [2022-11-03 02:08:36,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:08:36,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:08:36,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:08:36,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:08:36,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,804 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:08:36,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:08:36,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:08:36,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:08:36,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36" (1/1) ... [2022-11-03 02:08:36,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:08:36,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:36,852 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:08:36,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:08:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:08:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:08:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:08:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:08:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-11-03 02:08:36,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-11-03 02:08:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:08:36,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:08:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:08:37,016 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:08:37,019 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:08:37,404 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:08:37,410 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:08:37,411 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:08:37,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:08:37 BoogieIcfgContainer [2022-11-03 02:08:37,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:08:37,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:08:37,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:08:37,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:08:37,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:08:36" (1/3) ... [2022-11-03 02:08:37,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326014dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:08:37, skipping insertion in model container [2022-11-03 02:08:37,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:36" (2/3) ... [2022-11-03 02:08:37,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326014dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:08:37, skipping insertion in model container [2022-11-03 02:08:37,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:08:37" (3/3) ... [2022-11-03 02:08:37,423 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr4.c [2022-11-03 02:08:37,444 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:08:37,444 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:08:37,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:08:37,505 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@35600379, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:08:37,506 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:08:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:08:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:08:37,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:37,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:37,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:37,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1807585031, now seen corresponding path program 1 times [2022-11-03 02:08:37,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:37,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115045376] [2022-11-03 02:08:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:37,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:37,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:37,550 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:37,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:08:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:37,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:08:37,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:37,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:37,912 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:37,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115045376] [2022-11-03 02:08:37,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115045376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:37,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:37,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:37,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144842332] [2022-11-03 02:08:37,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:37,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:37,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:37,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:37,956 INFO L87 Difference]: Start difference. First operand has 34 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:38,493 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2022-11-03 02:08:38,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:08:38,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 02:08:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:38,516 INFO L225 Difference]: With dead ends: 84 [2022-11-03 02:08:38,516 INFO L226 Difference]: Without dead ends: 44 [2022-11-03 02:08:38,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:08:38,525 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:38,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 52 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:08:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-03 02:08:38,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2022-11-03 02:08:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:08:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-03 02:08:38,610 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 11 [2022-11-03 02:08:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:38,610 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-03 02:08:38,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-03 02:08:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:08:38,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:38,617 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:38,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:38,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:38,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:38,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:38,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1998588124, now seen corresponding path program 1 times [2022-11-03 02:08:38,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:38,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509306430] [2022-11-03 02:08:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:38,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:38,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:38,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:38,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:08:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:38,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:08:38,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:39,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:39,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:08:39,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:08:39,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:39,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 02:08:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:39,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:39,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:08:39,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:08:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:39,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:39,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509306430] [2022-11-03 02:08:39,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509306430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:39,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [192842321] [2022-11-03 02:08:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:39,948 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:39,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:08:39,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:08:39,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-03 02:08:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:40,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:08:40,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:40,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:40,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-03 02:08:40,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:40,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:40,632 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:08:40,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-11-03 02:08:40,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:40,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:40,825 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:08:40,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-11-03 02:08:41,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:41,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:41,016 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:08:41,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 02:08:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:08:41,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:44,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [192842321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:44,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347153546] [2022-11-03 02:08:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:44,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:44,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:44,186 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:44,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:08:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:44,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:08:44,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:44,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:44,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:08:44,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:08:44,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:44,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 02:08:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:44,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:44,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:08:44,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:08:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:44,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347153546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:44,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-11-03 02:08:44,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 9, 9, 6] total 20 [2022-11-03 02:08:44,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57858962] [2022-11-03 02:08:44,919 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:44,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:08:44,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:44,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:08:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=326, Unknown=1, NotChecked=0, Total=420 [2022-11-03 02:08:44,924 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:08:46,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:46,553 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2022-11-03 02:08:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:08:46,554 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 37 [2022-11-03 02:08:46,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:46,557 INFO L225 Difference]: With dead ends: 121 [2022-11-03 02:08:46,557 INFO L226 Difference]: Without dead ends: 119 [2022-11-03 02:08:46,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=237, Invalid=754, Unknown=1, NotChecked=0, Total=992 [2022-11-03 02:08:46,559 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 248 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:46,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 290 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 439 Invalid, 0 Unknown, 59 Unchecked, 1.1s Time] [2022-11-03 02:08:46,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-03 02:08:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 61. [2022-11-03 02:08:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:08:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2022-11-03 02:08:46,585 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 37 [2022-11-03 02:08:46,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:46,586 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2022-11-03 02:08:46,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:08:46,586 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2022-11-03 02:08:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:08:46,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:46,588 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:46,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 02:08:46,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:47,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:47,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:47,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:47,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1858039514, now seen corresponding path program 1 times [2022-11-03 02:08:47,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:47,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052441187] [2022-11-03 02:08:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:47,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:47,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:47,214 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:47,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:08:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:47,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:08:47,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:47,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:47,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:08:47,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:08:47,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:47,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:08:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:08:47,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:48,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-03 02:08:48,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-03 02:08:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:48,429 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:48,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052441187] [2022-11-03 02:08:48,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052441187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:48,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1767692142] [2022-11-03 02:08:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:48,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:48,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:08:48,432 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:08:48,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 02:08:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:48,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:08:48,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:48,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:48,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:08:48,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:08:49,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:49,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:08:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:08:49,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:49,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-03 02:08:49,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-03 02:08:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:49,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1767692142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:49,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934983308] [2022-11-03 02:08:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:49,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:49,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:49,454 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:49,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:08:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:49,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:08:49,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:49,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:49,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:08:49,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:08:50,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:50,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:08:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:08:50,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:50,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-03 02:08:50,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-03 02:08:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:50,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934983308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:50,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:08:50,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 10, 8] total 16 [2022-11-03 02:08:50,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271471116] [2022-11-03 02:08:50,471 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:50,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:08:50,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:50,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:08:50,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:08:50,475 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:08:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:51,849 INFO L93 Difference]: Finished difference Result 139 states and 190 transitions. [2022-11-03 02:08:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:08:51,850 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 37 [2022-11-03 02:08:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:51,852 INFO L225 Difference]: With dead ends: 139 [2022-11-03 02:08:51,852 INFO L226 Difference]: Without dead ends: 137 [2022-11-03 02:08:51,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 176 SyntacticMatches, 26 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:08:51,854 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 122 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:51,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 276 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 254 Invalid, 0 Unknown, 64 Unchecked, 0.7s Time] [2022-11-03 02:08:51,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-03 02:08:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2022-11-03 02:08:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 64 states have internal predecessors, (83), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-03 02:08:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-11-03 02:08:51,888 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 37 [2022-11-03 02:08:51,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:51,889 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-11-03 02:08:51,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:08:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-11-03 02:08:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 02:08:51,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:51,894 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:51,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:52,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:52,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:52,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:52,507 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:52,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1526874982, now seen corresponding path program 1 times [2022-11-03 02:08:52,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:52,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537708648] [2022-11-03 02:08:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:52,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:52,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:52,510 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:52,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:08:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:52,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:08:52,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:52,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:52,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:08:52,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:08:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:52,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:53,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 02:08:53,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-03 02:08:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:53,398 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:53,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537708648] [2022-11-03 02:08:53,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537708648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:53,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [722588871] [2022-11-03 02:08:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:53,399 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:53,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:08:53,401 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:08:53,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 02:08:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:53,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:08:53,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:53,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:53,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:08:54,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:08:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:08:54,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:54,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:08:54,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:08:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:54,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [722588871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:54,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211997434] [2022-11-03 02:08:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:54,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:54,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:54,613 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:54,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:08:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:08:54,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:54,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:54,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:08:54,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:08:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:55,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:55,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 02:08:55,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-03 02:08:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:55,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211997434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:55,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:08:55,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9, 7, 9, 7] total 20 [2022-11-03 02:08:55,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330715624] [2022-11-03 02:08:55,295 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:55,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:08:55,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:08:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:08:55,297 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:08:57,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:57,069 INFO L93 Difference]: Finished difference Result 272 states and 393 transitions. [2022-11-03 02:08:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:08:57,070 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2022-11-03 02:08:57,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:57,074 INFO L225 Difference]: With dead ends: 272 [2022-11-03 02:08:57,074 INFO L226 Difference]: Without dead ends: 270 [2022-11-03 02:08:57,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 214 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 02:08:57,079 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 210 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:57,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 481 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 495 Invalid, 0 Unknown, 56 Unchecked, 1.3s Time] [2022-11-03 02:08:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-03 02:08:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 149. [2022-11-03 02:08:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 108 states have (on average 1.3518518518518519) internal successors, (146), 112 states have internal predecessors, (146), 34 states have call successors, (34), 6 states have call predecessors, (34), 6 states have return successors, (34), 30 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-03 02:08:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2022-11-03 02:08:57,166 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 41 [2022-11-03 02:08:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:57,166 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2022-11-03 02:08:57,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:08:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2022-11-03 02:08:57,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 02:08:57,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:57,175 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:57,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:57,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:57,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:57,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:57,779 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:57,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:57,779 INFO L85 PathProgramCache]: Analyzing trace with hash 962653980, now seen corresponding path program 1 times [2022-11-03 02:08:57,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:57,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266768566] [2022-11-03 02:08:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:57,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:57,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:57,781 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:57,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:08:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:57,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:08:57,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:58,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:58,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:08:58,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:08:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:08:58,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:58,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:08:58,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:08:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:58,932 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:58,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266768566] [2022-11-03 02:08:58,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266768566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:58,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [79233163] [2022-11-03 02:08:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:58,932 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:58,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:08:58,934 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:08:58,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 02:08:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:59,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:08:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:59,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:08:59,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:08:59,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:08:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:08:59,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:59,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:08:59,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:08:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:59,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [79233163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:59,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408233937] [2022-11-03 02:08:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:59,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:59,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:59,847 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:59,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:08:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:59,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:08:59,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:00,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:09:00,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:09:00,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:09:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:09:00,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:00,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:09:00,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:09:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:00,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408233937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:00,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:09:00,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9, 8, 10, 9] total 17 [2022-11-03 02:09:00,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835253283] [2022-11-03 02:09:00,785 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:09:00,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:09:00,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:00,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:09:00,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:09:00,786 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:09:03,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:05,255 INFO L93 Difference]: Finished difference Result 397 states and 573 transitions. [2022-11-03 02:09:05,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:09:05,262 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2022-11-03 02:09:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:05,265 INFO L225 Difference]: With dead ends: 397 [2022-11-03 02:09:05,265 INFO L226 Difference]: Without dead ends: 395 [2022-11-03 02:09:05,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 205 SyntacticMatches, 20 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:09:05,267 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 126 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 129 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:05,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 491 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 520 Invalid, 1 Unknown, 69 Unchecked, 3.4s Time] [2022-11-03 02:09:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-03 02:09:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 201. [2022-11-03 02:09:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 144 states have (on average 1.375) internal successors, (198), 149 states have internal predecessors, (198), 48 states have call successors, (48), 8 states have call predecessors, (48), 8 states have return successors, (48), 43 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-03 02:09:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 294 transitions. [2022-11-03 02:09:05,320 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 294 transitions. Word has length 41 [2022-11-03 02:09:05,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:05,320 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 294 transitions. [2022-11-03 02:09:05,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:09:05,321 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 294 transitions. [2022-11-03 02:09:05,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:09:05,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:05,322 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:05,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:05,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:05,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-03 02:09:05,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:05,939 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:05,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:05,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1227872016, now seen corresponding path program 2 times [2022-11-03 02:09:05,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:05,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059236281] [2022-11-03 02:09:05,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:09:05,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:05,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:05,941 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:05,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:09:06,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:09:06,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:09:06,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:09:06,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:06,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:09:06,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:09:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:06,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:06,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 02:09:06,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-03 02:09:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:06,753 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:06,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059236281] [2022-11-03 02:09:06,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059236281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:06,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [40495013] [2022-11-03 02:09:06,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:09:06,754 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:06,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:09:06,756 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:09:06,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 02:09:06,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:09:06,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:09:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:09:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:07,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:09:07,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:09:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:09:07,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:07,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:09:07,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:09:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:07,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [40495013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:07,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452136077] [2022-11-03 02:09:07,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:09:07,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:07,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:07,741 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:07,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:09:07,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:09:07,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:09:07,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:09:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:07,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:09:07,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:09:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:08,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:08,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 02:09:08,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-03 02:09:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:08,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452136077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:08,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:09:08,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10, 8, 10, 8] total 23 [2022-11-03 02:09:08,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258560667] [2022-11-03 02:09:08,340 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:09:08,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:09:08,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:09:08,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:09:08,342 INFO L87 Difference]: Start difference. First operand 201 states and 294 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:09:13,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:16,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:18,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:18,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:18,314 INFO L93 Difference]: Finished difference Result 1128 states and 1742 transitions. [2022-11-03 02:09:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 02:09:18,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 45 [2022-11-03 02:09:18,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:18,322 INFO L225 Difference]: With dead ends: 1128 [2022-11-03 02:09:18,322 INFO L226 Difference]: Without dead ends: 1126 [2022-11-03 02:09:18,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 240 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:09:18,324 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 277 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 246 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:18,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 663 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 1215 Invalid, 3 Unknown, 67 Unchecked, 8.9s Time] [2022-11-03 02:09:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2022-11-03 02:09:18,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 431. [2022-11-03 02:09:18,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 312 states have (on average 1.4102564102564104) internal successors, (440), 316 states have internal predecessors, (440), 106 states have call successors, (106), 12 states have call predecessors, (106), 12 states have return successors, (106), 102 states have call predecessors, (106), 106 states have call successors, (106) [2022-11-03 02:09:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 652 transitions. [2022-11-03 02:09:18,451 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 652 transitions. Word has length 45 [2022-11-03 02:09:18,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:18,452 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 652 transitions. [2022-11-03 02:09:18,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 02:09:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 652 transitions. [2022-11-03 02:09:18,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:09:18,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:18,454 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:18,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:18,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:18,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:19,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:19,081 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1650573842, now seen corresponding path program 1 times [2022-11-03 02:09:19,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:19,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886113753] [2022-11-03 02:09:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:19,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:19,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:19,083 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:19,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:09:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:19,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:09:19,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:19,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:09:19,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:09:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:09:19,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:20,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:09:20,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:09:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:20,333 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:20,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886113753] [2022-11-03 02:09:20,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886113753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:20,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1984077037] [2022-11-03 02:09:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:20,334 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:20,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:09:20,335 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:09:20,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 02:09:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:20,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:09:20,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:20,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:09:20,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:09:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:09:20,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:21,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:09:21,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:09:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:21,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1984077037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:21,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496490730] [2022-11-03 02:09:21,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:21,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:21,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:21,309 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:21,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:09:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:21,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:09:21,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:21,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:09:21,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:09:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:09:21,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:22,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:09:22,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:09:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:22,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496490730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:22,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:09:22,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10, 9, 11, 10] total 19 [2022-11-03 02:09:22,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99342785] [2022-11-03 02:09:22,187 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:09:22,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:09:22,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:09:22,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:09:22,190 INFO L87 Difference]: Start difference. First operand 431 states and 652 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:09:25,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:29,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:32,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:34,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:35,202 INFO L93 Difference]: Finished difference Result 1518 states and 2334 transitions. [2022-11-03 02:09:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 02:09:35,203 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 45 [2022-11-03 02:09:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:35,210 INFO L225 Difference]: With dead ends: 1518 [2022-11-03 02:09:35,211 INFO L226 Difference]: Without dead ends: 1516 [2022-11-03 02:09:35,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 238 SyntacticMatches, 12 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=474, Invalid=2606, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:09:35,213 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 239 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 351 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:35,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 877 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 1228 Invalid, 2 Unknown, 122 Unchecked, 10.6s Time] [2022-11-03 02:09:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2022-11-03 02:09:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 566. [2022-11-03 02:09:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 408 states have (on average 1.4240196078431373) internal successors, (581), 412 states have internal predecessors, (581), 142 states have call successors, (142), 15 states have call predecessors, (142), 15 states have return successors, (142), 138 states have call predecessors, (142), 142 states have call successors, (142) [2022-11-03 02:09:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 865 transitions. [2022-11-03 02:09:35,380 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 865 transitions. Word has length 45 [2022-11-03 02:09:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:35,381 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 865 transitions. [2022-11-03 02:09:35,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:09:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 865 transitions. [2022-11-03 02:09:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:09:35,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:35,384 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:35,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:35,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:35,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-03 02:09:35,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:35,997 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:35,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:35,998 INFO L85 PathProgramCache]: Analyzing trace with hash -112998778, now seen corresponding path program 3 times [2022-11-03 02:09:35,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:35,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787424322] [2022-11-03 02:09:35,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:09:35,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:35,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:36,000 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:36,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:09:36,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:09:36,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:09:36,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:09:36,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:36,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:09:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:36,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:36,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 02:09:36,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-03 02:09:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:37,011 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:37,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787424322] [2022-11-03 02:09:37,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787424322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:37,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1822069118] [2022-11-03 02:09:37,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:09:37,012 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:37,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:09:37,013 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:09:37,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 02:09:37,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:09:37,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:09:37,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:09:37,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:37,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:09:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:37,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:38,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:09:38,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:09:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:38,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1822069118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:38,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23449646] [2022-11-03 02:09:38,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:09:38,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:38,132 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:38,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:09:38,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:09:38,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:09:38,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:09:38,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:38,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:09:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:38,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:38,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 02:09:38,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-03 02:09:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:38,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23449646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:38,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:09:38,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10, 9, 11, 9] total 25 [2022-11-03 02:09:38,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771639843] [2022-11-03 02:09:38,706 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:09:38,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:09:38,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:38,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:09:38,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:09:38,708 INFO L87 Difference]: Start difference. First operand 566 states and 865 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:09:47,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:49,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:49,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:49,639 INFO L93 Difference]: Finished difference Result 3026 states and 4789 transitions. [2022-11-03 02:09:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-03 02:09:49,643 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 49 [2022-11-03 02:09:49,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:49,657 INFO L225 Difference]: With dead ends: 3026 [2022-11-03 02:09:49,657 INFO L226 Difference]: Without dead ends: 3024 [2022-11-03 02:09:49,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=789, Invalid=3371, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 02:09:49,661 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 396 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 701 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:49,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 696 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 1422 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2022-11-03 02:09:49,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2022-11-03 02:09:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 1447. [2022-11-03 02:09:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1044 states have (on average 1.4588122605363985) internal successors, (1523), 1044 states have internal predecessors, (1523), 387 states have call successors, (387), 15 states have call predecessors, (387), 15 states have return successors, (387), 387 states have call predecessors, (387), 387 states have call successors, (387) [2022-11-03 02:09:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 2297 transitions. [2022-11-03 02:09:50,125 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 2297 transitions. Word has length 49 [2022-11-03 02:09:50,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:50,126 INFO L495 AbstractCegarLoop]: Abstraction has 1447 states and 2297 transitions. [2022-11-03 02:09:50,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:09:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 2297 transitions. [2022-11-03 02:09:50,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:09:50,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:50,129 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:50,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:50,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:50,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:50,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:50,732 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:50,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:50,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1801942520, now seen corresponding path program 1 times [2022-11-03 02:09:50,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:50,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133418688] [2022-11-03 02:09:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:50,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:50,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:50,734 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:50,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:09:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:50,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:09:50,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:51,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:09:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:51,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:51,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:09:51,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:09:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:51,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:51,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133418688] [2022-11-03 02:09:51,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133418688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:51,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1472107649] [2022-11-03 02:09:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:51,931 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:51,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:09:51,933 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:09:51,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 02:09:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:52,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:09:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:52,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:09:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:52,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:52,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:09:52,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:09:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:52,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1472107649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:52,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557945977] [2022-11-03 02:09:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:52,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:52,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:52,724 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:52,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 02:09:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:09:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:53,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:09:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:53,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:53,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:09:53,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:09:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:09:53,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557945977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:53,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:09:53,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 20 [2022-11-03 02:09:53,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229214843] [2022-11-03 02:09:53,583 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:09:53,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:09:53,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:53,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:09:53,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:09:53,585 INFO L87 Difference]: Start difference. First operand 1447 states and 2297 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:09:57,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:01,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:04,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:05,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:05,298 INFO L93 Difference]: Finished difference Result 2804 states and 4407 transitions. [2022-11-03 02:10:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 02:10:05,299 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-11-03 02:10:05,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:05,311 INFO L225 Difference]: With dead ends: 2804 [2022-11-03 02:10:05,311 INFO L226 Difference]: Without dead ends: 2802 [2022-11-03 02:10:05,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:10:05,315 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 231 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 360 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:05,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 532 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 883 Invalid, 3 Unknown, 0 Unchecked, 8.8s Time] [2022-11-03 02:10:05,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2022-11-03 02:10:05,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 590. [2022-11-03 02:10:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 432 states have (on average 1.4097222222222223) internal successors, (609), 436 states have internal predecessors, (609), 142 states have call successors, (142), 15 states have call predecessors, (142), 15 states have return successors, (142), 138 states have call predecessors, (142), 142 states have call successors, (142) [2022-11-03 02:10:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 893 transitions. [2022-11-03 02:10:05,598 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 893 transitions. Word has length 49 [2022-11-03 02:10:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:05,599 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 893 transitions. [2022-11-03 02:10:05,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:10:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 893 transitions. [2022-11-03 02:10:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:10:05,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:05,603 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:05,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:05,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:06,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:06,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:06,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:06,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1773729028, now seen corresponding path program 4 times [2022-11-03 02:10:06,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:06,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962081245] [2022-11-03 02:10:06,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:10:06,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:06,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:06,219 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:06,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:10:06,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:10:06,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:10:06,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:10:06,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:10:10,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:10:13,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:13,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962081245] [2022-11-03 02:10:13,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962081245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:13,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [501010682] [2022-11-03 02:10:13,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:10:13,266 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:13,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:10:13,268 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:10:13,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 02:10:13,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:10:13,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:10:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:10:13,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:10:15,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:10:17,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [501010682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:17,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216459789] [2022-11-03 02:10:17,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:10:17,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:17,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:17,011 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:17,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 02:10:17,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:10:17,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:10:17,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:10:17,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:10:19,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:10:20,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216459789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:20,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:10:20,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12, 12, 12, 11] total 23 [2022-11-03 02:10:20,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312414492] [2022-11-03 02:10:20,055 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:10:20,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:10:20,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:20,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:10:20,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:10:20,057 INFO L87 Difference]: Start difference. First operand 590 states and 893 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:10:26,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:26,667 INFO L93 Difference]: Finished difference Result 763 states and 1146 transitions. [2022-11-03 02:10:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:10:26,671 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 53 [2022-11-03 02:10:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:26,673 INFO L225 Difference]: With dead ends: 763 [2022-11-03 02:10:26,674 INFO L226 Difference]: Without dead ends: 739 [2022-11-03 02:10:26,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:10:26,676 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 361 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:26,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 233 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-03 02:10:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-11-03 02:10:26,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 606. [2022-11-03 02:10:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 448 states have (on average 1.3950892857142858) internal successors, (625), 448 states have internal predecessors, (625), 142 states have call successors, (142), 15 states have call predecessors, (142), 15 states have return successors, (142), 142 states have call predecessors, (142), 142 states have call successors, (142) [2022-11-03 02:10:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 909 transitions. [2022-11-03 02:10:26,928 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 909 transitions. Word has length 53 [2022-11-03 02:10:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:26,929 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 909 transitions. [2022-11-03 02:10:26,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:10:26,929 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 909 transitions. [2022-11-03 02:10:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:10:26,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:26,931 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:26,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:27,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:27,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:27,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:27,545 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:27,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1645650707, now seen corresponding path program 2 times [2022-11-03 02:10:27,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:27,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378521004] [2022-11-03 02:10:27,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:10:27,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:27,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:27,547 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:27,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:10:27,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:10:27,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:10:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:10:27,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:27,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:10:27,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:27,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:28,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:28,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:28,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:10:28,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:28,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:10:28,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:28,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:10:28,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:28,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:10:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:10:28,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:28,968 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:28,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378521004] [2022-11-03 02:10:28,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378521004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:10:28,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1628990899] [2022-11-03 02:10:28,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:10:28,968 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:28,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:10:28,969 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:10:28,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 02:10:29,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:10:29,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:10:29,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:10:29,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:29,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:10:29,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:29,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:29,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:29,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:29,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:10:29,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:29,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:10:29,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:29,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:10:29,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:29,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:10:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:10:29,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:30,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1628990899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:10:30,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699876663] [2022-11-03 02:10:30,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:10:30,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:30,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:30,271 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:30,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 02:10:30,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:10:30,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:10:30,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:10:30,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:30,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:10:30,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:30,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:30,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:30,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:30,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:10:30,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:30,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:10:31,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:31,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:10:31,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:31,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 02:10:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:10:31,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:31,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699876663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:10:31,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:10:31,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 11 [2022-11-03 02:10:31,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226976240] [2022-11-03 02:10:31,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:10:31,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:10:31,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:31,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:10:31,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:10:31,513 INFO L87 Difference]: Start difference. First operand 606 states and 909 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:10:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:32,458 INFO L93 Difference]: Finished difference Result 825 states and 1215 transitions. [2022-11-03 02:10:32,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:10:32,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 63 [2022-11-03 02:10:32,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:32,461 INFO L225 Difference]: With dead ends: 825 [2022-11-03 02:10:32,461 INFO L226 Difference]: Without dead ends: 823 [2022-11-03 02:10:32,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 202 SyntacticMatches, 52 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:10:32,463 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 120 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:32,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 271 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 248 Invalid, 0 Unknown, 41 Unchecked, 0.6s Time] [2022-11-03 02:10:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-11-03 02:10:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 681. [2022-11-03 02:10:32,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 498 states have (on average 1.4036144578313252) internal successors, (699), 504 states have internal predecessors, (699), 166 states have call successors, (166), 16 states have call predecessors, (166), 16 states have return successors, (166), 160 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-03 02:10:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1031 transitions. [2022-11-03 02:10:32,736 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1031 transitions. Word has length 63 [2022-11-03 02:10:32,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:32,736 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 1031 transitions. [2022-11-03 02:10:32,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:10:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1031 transitions. [2022-11-03 02:10:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:10:32,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:32,739 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:32,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:32,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:33,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:33,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:33,367 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:33,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1480379401, now seen corresponding path program 2 times [2022-11-03 02:10:33,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:33,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974437075] [2022-11-03 02:10:33,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:10:33,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:33,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:33,369 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:33,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:10:33,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:10:33,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:10:33,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:10:33,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:33,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:10:33,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:33,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:34,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:34,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-03 02:10:34,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:34,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-03 02:10:34,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:34,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-03 02:10:34,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:10:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:10:34,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:34,881 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:34,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974437075] [2022-11-03 02:10:34,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974437075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:10:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [591072443] [2022-11-03 02:10:34,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:10:34,882 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:34,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:10:34,883 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:10:34,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 02:10:35,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:10:35,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:10:35,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:10:35,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:35,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:10:35,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:35,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:35,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-03 02:10:35,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:35,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-03 02:10:35,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:35,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-03 02:10:35,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:10:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:10:35,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:36,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [591072443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:10:36,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399196246] [2022-11-03 02:10:36,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:10:36,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:36,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:36,197 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:36,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 02:10:36,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:10:36,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:10:36,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:10:36,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:36,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:10:36,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:10:36,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:10:36,947 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-03 02:10:36,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-03 02:10:37,070 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-03 02:10:37,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-03 02:10:37,342 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-11-03 02:10:37,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2022-11-03 02:10:37,584 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-11-03 02:10:37,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2022-11-03 02:10:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:10:38,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:40,471 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| (_ BitVec 32)) (v_ArrVal_584 (_ BitVec 32))) (not (= (select (let ((.cse0 (bvmul (_ bv16 32) |ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4294967280 32) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) v_ArrVal_584) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv4294967284 32) .cse0) |c_ULTIMATE.start_main_~FIXEDVAL~0#1|)) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv4 32))) |c_ULTIMATE.start_main_~DEFAULTVAL~0#1|))) is different from false [2022-11-03 02:10:40,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399196246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:10:40,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:10:40,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 17 [2022-11-03 02:10:40,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848941034] [2022-11-03 02:10:40,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:10:40,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:10:40,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:40,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:10:40,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=404, Unknown=1, NotChecked=42, Total=552 [2022-11-03 02:10:40,499 INFO L87 Difference]: Start difference. First operand 681 states and 1031 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-03 02:10:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:41,878 INFO L93 Difference]: Finished difference Result 818 states and 1203 transitions. [2022-11-03 02:10:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:10:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 67 [2022-11-03 02:10:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:41,883 INFO L225 Difference]: With dead ends: 818 [2022-11-03 02:10:41,883 INFO L226 Difference]: Without dead ends: 816 [2022-11-03 02:10:41,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 216 SyntacticMatches, 45 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=196, Invalid=737, Unknown=1, NotChecked=58, Total=992 [2022-11-03 02:10:41,885 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 119 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:41,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 293 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 0 Unknown, 67 Unchecked, 0.5s Time] [2022-11-03 02:10:41,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-11-03 02:10:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 719. [2022-11-03 02:10:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 526 states have (on average 1.4049429657794676) internal successors, (739), 532 states have internal predecessors, (739), 174 states have call successors, (174), 18 states have call predecessors, (174), 18 states have return successors, (174), 168 states have call predecessors, (174), 174 states have call successors, (174) [2022-11-03 02:10:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1087 transitions. [2022-11-03 02:10:42,160 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1087 transitions. Word has length 67 [2022-11-03 02:10:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:42,162 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 1087 transitions. [2022-11-03 02:10:42,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-03 02:10:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1087 transitions. [2022-11-03 02:10:42,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:10:42,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:42,167 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:42,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:42,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:42,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:42,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:42,791 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:42,791 INFO L85 PathProgramCache]: Analyzing trace with hash 949660519, now seen corresponding path program 5 times [2022-11-03 02:10:42,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:42,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106624635] [2022-11-03 02:10:42,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:10:42,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:42,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:42,793 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:42,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:10:42,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-03 02:10:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:10:42,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:10:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:43,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:10:43,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:10:43,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:10:43,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:10:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:10:43,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:44,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 02:10:44,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-03 02:10:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:10:44,477 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:44,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106624635] [2022-11-03 02:10:44,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106624635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:44,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2111530346] [2022-11-03 02:10:44,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:10:44,478 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:44,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:10:44,479 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:10:44,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 02:10:44,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:10:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30769519] [2022-11-03 02:10:44,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:10:44,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:44,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:44,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 1 [2022-11-03 02:10:44,658 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:44,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 02:10:45,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-03 02:10:45,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:10:45,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:10:45,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:45,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:10:45,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:10:45,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:10:45,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:10:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:10:45,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:46,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 02:10:46,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-03 02:10:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:10:46,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30769519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:46,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 02:10:46,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13, 11] total 22 [2022-11-03 02:10:46,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229084888] [2022-11-03 02:10:46,503 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 02:10:46,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:10:46,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:46,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:10:46,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:10:46,506 INFO L87 Difference]: Start difference. First operand 719 states and 1087 transitions. Second operand has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 22 states have internal predecessors, (95), 6 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-03 02:11:01,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:03,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:05,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:07,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:09,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:11,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:13,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:17,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:19,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:19,917 INFO L93 Difference]: Finished difference Result 6517 states and 10377 transitions. [2022-11-03 02:11:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-03 02:11:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 22 states have internal predecessors, (95), 6 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 79 [2022-11-03 02:11:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:19,944 INFO L225 Difference]: With dead ends: 6517 [2022-11-03 02:11:19,944 INFO L226 Difference]: Without dead ends: 6515 [2022-11-03 02:11:19,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 283 SyntacticMatches, 9 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3681 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1367, Invalid=9139, Unknown=0, NotChecked=0, Total=10506 [2022-11-03 02:11:19,950 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 459 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 2984 mSolverCounterSat, 1303 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 4296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1303 IncrementalHoareTripleChecker+Valid, 2984 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:19,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 1455 Invalid, 4296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1303 Valid, 2984 Invalid, 9 Unknown, 0 Unchecked, 26.8s Time] [2022-11-03 02:11:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6515 states. [2022-11-03 02:11:20,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6515 to 1442. [2022-11-03 02:11:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1058 states have (on average 1.4413988657844992) internal successors, (1525), 1060 states have internal predecessors, (1525), 365 states have call successors, (365), 18 states have call predecessors, (365), 18 states have return successors, (365), 363 states have call predecessors, (365), 365 states have call successors, (365) [2022-11-03 02:11:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2255 transitions. [2022-11-03 02:11:20,648 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2255 transitions. Word has length 79 [2022-11-03 02:11:20,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:20,649 INFO L495 AbstractCegarLoop]: Abstraction has 1442 states and 2255 transitions. [2022-11-03 02:11:20,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 22 states have internal predecessors, (95), 6 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-03 02:11:20,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2255 transitions. [2022-11-03 02:11:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:11:20,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:20,653 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:20,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:20,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:21,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:21,079 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1373307241, now seen corresponding path program 1 times [2022-11-03 02:11:21,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:21,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765859784] [2022-11-03 02:11:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:21,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:21,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:21,080 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:21,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:11:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:21,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:11:21,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:21,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:11:21,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:11:21,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:11:21,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:11:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 48 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:11:22,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:23,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:11:23,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:11:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:11:23,456 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:23,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765859784] [2022-11-03 02:11:23,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765859784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:23,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1756326041] [2022-11-03 02:11:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:23,457 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:11:23,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:11:23,458 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:11:23,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 02:11:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:23,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:11:23,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:24,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:11:24,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:11:24,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:11:24,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:11:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 48 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:11:24,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:25,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:11:25,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:11:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:11:25,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1756326041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:25,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12709404] [2022-11-03 02:11:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:25,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:25,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:25,505 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:25,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 02:11:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:11:25,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:25,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:11:26,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:11:26,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:11:26,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:11:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 48 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:11:26,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:27,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:11:27,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:11:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:11:27,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12709404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:27,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:11:27,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13, 12, 14, 13] total 25 [2022-11-03 02:11:27,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493662926] [2022-11-03 02:11:27,391 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:11:27,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:11:27,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:11:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:11:27,393 INFO L87 Difference]: Start difference. First operand 1442 states and 2255 transitions. Second operand has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-03 02:11:35,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:37,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:37,837 INFO L93 Difference]: Finished difference Result 2125 states and 3274 transitions. [2022-11-03 02:11:37,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-03 02:11:37,838 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 79 [2022-11-03 02:11:37,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:37,843 INFO L225 Difference]: With dead ends: 2125 [2022-11-03 02:11:37,843 INFO L226 Difference]: Without dead ends: 2123 [2022-11-03 02:11:37,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 418 SyntacticMatches, 34 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=547, Invalid=3875, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 02:11:37,846 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 232 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 226 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:37,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 765 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 926 Invalid, 2 Unknown, 89 Unchecked, 6.6s Time] [2022-11-03 02:11:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-11-03 02:11:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1646. [2022-11-03 02:11:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1206 states have (on average 1.445273631840796) internal successors, (1743), 1206 states have internal predecessors, (1743), 417 states have call successors, (417), 22 states have call predecessors, (417), 22 states have return successors, (417), 417 states have call predecessors, (417), 417 states have call successors, (417) [2022-11-03 02:11:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2577 transitions. [2022-11-03 02:11:38,622 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2577 transitions. Word has length 79 [2022-11-03 02:11:38,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:38,622 INFO L495 AbstractCegarLoop]: Abstraction has 1646 states and 2577 transitions. [2022-11-03 02:11:38,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-03 02:11:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2577 transitions. [2022-11-03 02:11:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:11:38,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:38,627 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:38,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:38,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:39,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:39,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:39,243 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:39,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:39,243 INFO L85 PathProgramCache]: Analyzing trace with hash -739338403, now seen corresponding path program 6 times [2022-11-03 02:11:39,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:39,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138101298] [2022-11-03 02:11:39,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:11:39,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:39,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:39,244 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:39,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:11:39,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-03 02:11:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:11:39,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:11:39,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:39,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:11:39,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:11:39,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:11:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:11:40,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:43,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-03 02:11:43,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-03 02:11:43,425 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:11:43,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:43,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138101298] [2022-11-03 02:11:43,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138101298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:43,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [459639159] [2022-11-03 02:11:43,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:11:43,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:11:43,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:11:43,427 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:11:43,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 02:11:43,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:11:43,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306693402] [2022-11-03 02:11:43,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:11:43,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:43,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:43,751 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:43,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 1 [2022-11-03 02:11:43,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a4a64-71b6-4ccb-9295-648d90af2a95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 02:11:44,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-03 02:11:44,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:11:44,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:11:44,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:44,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:11:44,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-03 02:11:44,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:11:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:11:45,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:50,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 02:11:50,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-03 02:11:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:11:50,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306693402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:50,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 02:11:50,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17, 12] total 38 [2022-11-03 02:11:50,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911224225] [2022-11-03 02:11:50,128 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 02:11:50,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:11:50,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:50,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:11:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:11:50,130 INFO L87 Difference]: Start difference. First operand 1646 states and 2577 transitions. Second operand has 38 states, 38 states have (on average 4.0) internal successors, (152), 38 states have internal predecessors, (152), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-03 02:11:58,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:17,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:19,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:21,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:23,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:25,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:28,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:31,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:33,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:35,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:37,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:39,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:41,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:43,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:45,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:47,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:49,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []