./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aec2f9127d2f09ac657db5f4ff454a031f6027c12ee4edfdaac8d9dd392f7955 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:43:56,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:43:56,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:43:56,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:43:56,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:43:56,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:43:56,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:43:56,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:43:56,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:43:56,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:43:56,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:43:56,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:43:56,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:43:56,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:43:56,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:43:56,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:43:56,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:43:56,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:43:56,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:43:56,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:43:56,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:43:56,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:43:56,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:43:56,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:43:56,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:43:56,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:43:56,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:43:56,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:43:56,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:43:56,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:43:56,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:43:56,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:43:56,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:43:56,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:43:56,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:43:56,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:43:56,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:43:56,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:43:56,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:43:56,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:43:56,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:43:56,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:43:56,690 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:43:56,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:43:56,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:43:56,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:43:56,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:43:56,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:43:56,705 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:43:56,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:43:56,706 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:43:56,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:43:56,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:43:56,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:43:56,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:43:56,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:43:56,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:43:56,709 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:43:56,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:43:56,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:43:56,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:43:56,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:43:56,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:43:56,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:43:56,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:43:56,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:43:56,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:43:56,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:43:56,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:43:56,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:43:56,713 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:43:56,715 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:43:56,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:43:56,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:43:56,716 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_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aec2f9127d2f09ac657db5f4ff454a031f6027c12ee4edfdaac8d9dd392f7955 [2021-11-09 09:43:57,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:43:57,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:43:57,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:43:57,094 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:43:57,095 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:43:57,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c [2021-11-09 09:43:57,189 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/data/17bcfd819/3478e342013c48459d20054577cf44eb/FLAGfaf1469ce [2021-11-09 09:43:57,620 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:43:57,620 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c [2021-11-09 09:43:57,627 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/data/17bcfd819/3478e342013c48459d20054577cf44eb/FLAGfaf1469ce [2021-11-09 09:43:58,025 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/data/17bcfd819/3478e342013c48459d20054577cf44eb [2021-11-09 09:43:58,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:43:58,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:43:58,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:43:58,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:43:58,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:43:58,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:43:58" (1/1) ... [2021-11-09 09:43:58,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba14ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58, skipping insertion in model container [2021-11-09 09:43:58,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:43:58" (1/1) ... [2021-11-09 09:43:58,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:43:58,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:43:58,302 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c[408,421] [2021-11-09 09:43:58,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:43:58,369 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:43:58,388 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c[408,421] [2021-11-09 09:43:58,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:43:58,433 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:43:58,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58 WrapperNode [2021-11-09 09:43:58,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:43:58,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:43:58,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:43:58,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:43:58,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58" (1/1) ... [2021-11-09 09:43:58,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58" (1/1) ... [2021-11-09 09:43:58,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:43:58,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:43:58,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:43:58,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:43:58,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58" (1/1) ... [2021-11-09 09:43:58,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58" (1/1) ... [2021-11-09 09:43:58,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58" (1/1) ... [2021-11-09 09:43:58,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58" (1/1) ... [2021-11-09 09:43:58,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58" (1/1) ... [2021-11-09 09:43:58,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58" (1/1) ... [2021-11-09 09:43:58,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58" (1/1) ... [2021-11-09 09:43:58,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:43:58,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:43:58,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:43:58,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:43:58,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58" (1/1) ... [2021-11-09 09:43:58,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:43:58,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:58,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:43:58,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:43:58,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:43:58,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:43:58,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:43:58,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:43:58,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:43:58,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:43:58,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:43:58,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:43:58,973 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-09 09:43:58,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:43:58 BoogieIcfgContainer [2021-11-09 09:43:58,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:43:58,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:43:58,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:43:58,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:43:58,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:43:58" (1/3) ... [2021-11-09 09:43:58,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbed54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:43:58, skipping insertion in model container [2021-11-09 09:43:58,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:43:58" (2/3) ... [2021-11-09 09:43:58,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbed54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:43:58, skipping insertion in model container [2021-11-09 09:43:58,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:43:58" (3/3) ... [2021-11-09 09:43:58,985 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2021-11-09 09:43:58,991 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:43:58,991 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:43:59,050 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:43:59,075 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:43:59,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:43:59,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 35 states have (on average 1.6) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:43:59,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:59,101 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:59,102 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:59,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2021-11-09 09:43:59,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:59,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395070797] [2021-11-09 09:43:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:59,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:43:59,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:59,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395070797] [2021-11-09 09:43:59,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395070797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:43:59,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:43:59,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:43:59,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990526482] [2021-11-09 09:43:59,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:43:59,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:59,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:43:59,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:43:59,341 INFO L87 Difference]: Start difference. First operand has 37 states, 35 states have (on average 1.6) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:59,366 INFO L93 Difference]: Finished difference Result 69 states and 104 transitions. [2021-11-09 09:43:59,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:43:59,368 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 09:43:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:59,379 INFO L225 Difference]: With dead ends: 69 [2021-11-09 09:43:59,379 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 09:43:59,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:43:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 09:43:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-09 09:43:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-11-09 09:43:59,438 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2021-11-09 09:43:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:59,438 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-11-09 09:43:59,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:59,439 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-11-09 09:43:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:43:59,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:59,440 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:59,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:43:59,440 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2021-11-09 09:43:59,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:59,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973986574] [2021-11-09 09:43:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:59,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:43:59,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:59,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973986574] [2021-11-09 09:43:59,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973986574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:43:59,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:43:59,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:43:59,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146232605] [2021-11-09 09:43:59,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:43:59,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:43:59,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:43:59,539 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:59,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:59,630 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2021-11-09 09:43:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:43:59,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 09:43:59,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:59,632 INFO L225 Difference]: With dead ends: 63 [2021-11-09 09:43:59,632 INFO L226 Difference]: Without dead ends: 35 [2021-11-09 09:43:59,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:43:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-09 09:43:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-11-09 09:43:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-09 09:43:59,642 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2021-11-09 09:43:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:59,642 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-09 09:43:59,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:59,643 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-09 09:43:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:43:59,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:59,645 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:59,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:43:59,646 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:59,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:59,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2021-11-09 09:43:59,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:59,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355227077] [2021-11-09 09:43:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:59,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:43:59,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:59,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355227077] [2021-11-09 09:43:59,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355227077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:43:59,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:43:59,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:43:59,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770549566] [2021-11-09 09:43:59,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:43:59,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:59,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:43:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:43:59,750 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:59,895 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2021-11-09 09:43:59,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:43:59,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 09:43:59,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:59,898 INFO L225 Difference]: With dead ends: 76 [2021-11-09 09:43:59,898 INFO L226 Difference]: Without dead ends: 51 [2021-11-09 09:43:59,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:43:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-09 09:43:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2021-11-09 09:43:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-11-09 09:43:59,916 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2021-11-09 09:43:59,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:59,917 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-11-09 09:43:59,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:59,917 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-11-09 09:43:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 09:43:59,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:59,919 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:59,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:43:59,923 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:59,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:59,926 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2021-11-09 09:43:59,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:59,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604937713] [2021-11-09 09:43:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:59,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:44:00,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:00,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604937713] [2021-11-09 09:44:00,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604937713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:00,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073272767] [2021-11-09 09:44:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:00,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:00,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:00,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:00,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:44:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:00,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:44:00,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:44:00,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073272767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:00,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:00,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-09 09:44:00,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60918508] [2021-11-09 09:44:00,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:44:00,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:00,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:44:00,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:44:00,430 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:00,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:00,524 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2021-11-09 09:44:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:44:00,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 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 41 [2021-11-09 09:44:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:00,526 INFO L225 Difference]: With dead ends: 81 [2021-11-09 09:44:00,526 INFO L226 Difference]: Without dead ends: 45 [2021-11-09 09:44:00,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:44:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-09 09:44:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-11-09 09:44:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-11-09 09:44:00,535 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2021-11-09 09:44:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:00,535 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-11-09 09:44:00,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-11-09 09:44:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:44:00,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:00,538 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:00,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:00,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:00,763 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:00,764 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2021-11-09 09:44:00,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:00,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224492287] [2021-11-09 09:44:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:00,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 09:44:00,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:00,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224492287] [2021-11-09 09:44:00,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224492287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:00,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614445966] [2021-11-09 09:44:00,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:44:00,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:00,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:00,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:00,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:44:00,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:44:00,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:00,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:44:00,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 09:44:01,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614445966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:01,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:01,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-09 09:44:01,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427195454] [2021-11-09 09:44:01,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:44:01,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:01,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:44:01,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:44:01,181 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:01,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:01,384 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2021-11-09 09:44:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:44:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 09:44:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:01,390 INFO L225 Difference]: With dead ends: 101 [2021-11-09 09:44:01,390 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 09:44:01,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:44:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 09:44:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-11-09 09:44:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-11-09 09:44:01,413 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2021-11-09 09:44:01,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:01,413 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-11-09 09:44:01,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-11-09 09:44:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 09:44:01,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:01,420 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:01,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:01,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:01,644 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:01,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:01,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2021-11-09 09:44:01,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:01,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675125753] [2021-11-09 09:44:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:01,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:05,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:05,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675125753] [2021-11-09 09:44:05,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675125753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:05,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590997661] [2021-11-09 09:44:05,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:44:05,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:05,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:05,069 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:05,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:44:05,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:44:05,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:05,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-09 09:44:05,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:15,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:44:15,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-09 09:44:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:15,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590997661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:15,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:15,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 47] total 81 [2021-11-09 09:44:15,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365558879] [2021-11-09 09:44:15,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-09 09:44:15,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:15,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-09 09:44:15,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=6226, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 09:44:15,676 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 81 states, 81 states have (on average 1.4197530864197532) internal successors, (115), 81 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:27,044 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2021-11-09 09:44:27,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-09 09:44:27,053 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.4197530864197532) internal successors, (115), 81 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-09 09:44:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:27,055 INFO L225 Difference]: With dead ends: 169 [2021-11-09 09:44:27,055 INFO L226 Difference]: Without dead ends: 163 [2021-11-09 09:44:27,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 15 SyntacticMatches, 10 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=535, Invalid=13271, Unknown=0, NotChecked=0, Total=13806 [2021-11-09 09:44:27,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-09 09:44:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 101. [2021-11-09 09:44:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2021-11-09 09:44:27,081 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2021-11-09 09:44:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:27,082 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2021-11-09 09:44:27,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.4197530864197532) internal successors, (115), 81 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2021-11-09 09:44:27,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 09:44:27,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:27,085 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:27,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:27,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 09:44:27,311 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:27,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2021-11-09 09:44:27,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:27,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537731171] [2021-11-09 09:44:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:27,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 09:44:27,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:27,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537731171] [2021-11-09 09:44:27,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537731171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:27,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498948194] [2021-11-09 09:44:27,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:44:27,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:27,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:27,441 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:27,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:44:27,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:44:27,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:27,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:44:27,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 09:44:27,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498948194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:27,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:27,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 09:44:27,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572420259] [2021-11-09 09:44:27,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:44:27,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:27,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:44:27,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:44:27,911 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:28,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:28,273 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2021-11-09 09:44:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:44:28,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 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 61 [2021-11-09 09:44:28,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:28,275 INFO L225 Difference]: With dead ends: 233 [2021-11-09 09:44:28,275 INFO L226 Difference]: Without dead ends: 136 [2021-11-09 09:44:28,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:44:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-09 09:44:28,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2021-11-09 09:44:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:28,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2021-11-09 09:44:28,299 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 61 [2021-11-09 09:44:28,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:28,299 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2021-11-09 09:44:28,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:28,302 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2021-11-09 09:44:28,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:44:28,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:28,307 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:28,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:28,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:28,508 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:28,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:28,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1506179060, now seen corresponding path program 5 times [2021-11-09 09:44:28,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:28,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942571664] [2021-11-09 09:44:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:28,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-09 09:44:28,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:28,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942571664] [2021-11-09 09:44:28,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942571664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:28,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495243680] [2021-11-09 09:44:28,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:44:28,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:28,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:28,627 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:28,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:44:28,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 09:44:28,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:28,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:44:28,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-09 09:44:29,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495243680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:29,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:29,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 09:44:29,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471105298] [2021-11-09 09:44:29,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:44:29,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:29,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:44:29,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:44:29,177 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:29,506 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2021-11-09 09:44:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:44:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 09:44:29,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:29,507 INFO L225 Difference]: With dead ends: 126 [2021-11-09 09:44:29,507 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 09:44:29,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:44:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 09:44:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-11-09 09:44:29,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-11-09 09:44:29,515 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2021-11-09 09:44:29,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:29,515 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-11-09 09:44:29,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-11-09 09:44:29,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:44:29,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:29,517 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:29,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-09 09:44:29,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:29,735 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:29,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:29,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2021-11-09 09:44:29,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:29,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261408159] [2021-11-09 09:44:29,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:29,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:36,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:36,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261408159] [2021-11-09 09:44:36,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261408159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:36,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932990406] [2021-11-09 09:44:36,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:44:36,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:36,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:36,205 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:36,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:44:36,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 09:44:36,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:36,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-09 09:44:36,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:44:42,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932990406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:42,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:42,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 47] total 108 [2021-11-09 09:44:42,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845266016] [2021-11-09 09:44:42,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-09 09:44:42,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:42,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-09 09:44:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=11195, Unknown=0, NotChecked=0, Total=11556 [2021-11-09 09:44:42,363 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 108 states, 108 states have (on average 1.3518518518518519) internal successors, (146), 108 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:56,844 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2021-11-09 09:44:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-09 09:44:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.3518518518518519) internal successors, (146), 108 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 09:44:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:56,846 INFO L225 Difference]: With dead ends: 149 [2021-11-09 09:44:56,847 INFO L226 Difference]: Without dead ends: 145 [2021-11-09 09:44:56,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5767 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=1037, Invalid=27693, Unknown=0, NotChecked=0, Total=28730 [2021-11-09 09:44:56,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-09 09:44:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2021-11-09 09:44:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.123076923076923) internal successors, (146), 130 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2021-11-09 09:44:56,872 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 77 [2021-11-09 09:44:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:56,872 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2021-11-09 09:44:56,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.3518518518518519) internal successors, (146), 108 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2021-11-09 09:44:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:44:56,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:56,875 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:56,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-09 09:44:57,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 09:44:57,091 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:57,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:57,091 INFO L85 PathProgramCache]: Analyzing trace with hash -214262460, now seen corresponding path program 7 times [2021-11-09 09:44:57,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:57,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378070562] [2021-11-09 09:44:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:57,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-09 09:44:57,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:57,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378070562] [2021-11-09 09:44:57,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378070562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:57,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787360159] [2021-11-09 09:44:57,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:44:57,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:57,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:57,231 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:57,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:44:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:57,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:44:57,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-09 09:44:58,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787360159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:58,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:58,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 09:44:58,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074299365] [2021-11-09 09:44:58,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:44:58,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:58,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:44:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:44:58,025 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:58,409 INFO L93 Difference]: Finished difference Result 293 states and 328 transitions. [2021-11-09 09:44:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:44:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 09:44:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:58,411 INFO L225 Difference]: With dead ends: 293 [2021-11-09 09:44:58,411 INFO L226 Difference]: Without dead ends: 166 [2021-11-09 09:44:58,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:44:58,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-09 09:44:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 142. [2021-11-09 09:44:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1063829787234043) internal successors, (156), 141 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2021-11-09 09:44:58,423 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 79 [2021-11-09 09:44:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:58,423 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2021-11-09 09:44:58,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2021-11-09 09:44:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:44:58,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:58,425 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:58,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:58,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:44:58,635 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:58,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:58,635 INFO L85 PathProgramCache]: Analyzing trace with hash 385815078, now seen corresponding path program 8 times [2021-11-09 09:44:58,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:58,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857156378] [2021-11-09 09:44:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:58,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 09:44:58,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:58,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857156378] [2021-11-09 09:44:58,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857156378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:58,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940703054] [2021-11-09 09:44:58,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:44:58,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:58,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:58,750 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:58,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:44:59,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:44:59,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:59,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:44:59,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 09:44:59,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940703054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:59,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:59,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 09:44:59,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634965674] [2021-11-09 09:44:59,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:44:59,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:59,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:44:59,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:44:59,432 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:59,759 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2021-11-09 09:44:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:44:59,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-09 09:44:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:59,760 INFO L225 Difference]: With dead ends: 156 [2021-11-09 09:44:59,760 INFO L226 Difference]: Without dead ends: 104 [2021-11-09 09:44:59,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:44:59,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-09 09:44:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-11-09 09:44:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2021-11-09 09:44:59,769 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2021-11-09 09:44:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:59,769 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2021-11-09 09:44:59,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2021-11-09 09:44:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-09 09:44:59,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:59,771 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:59,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:59,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:44:59,983 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:59,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 9 times [2021-11-09 09:44:59,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:59,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372512187] [2021-11-09 09:44:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:59,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 8 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:08,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:08,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372512187] [2021-11-09 09:45:08,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372512187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:08,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264094992] [2021-11-09 09:45:08,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:45:08,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:08,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:08,917 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:08,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:45:09,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:45:09,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:09,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 153 conjunts are in the unsatisfiable core [2021-11-09 09:45:09,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:09,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:45:49,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:45:49,615 INFO L354 Elim1Store]: treesize reduction 81, result has 34.1 percent of original size [2021-11-09 09:45:49,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 69 [2021-11-09 09:45:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 5 proven. 135 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:45:50,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264094992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:50,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:45:50,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 74] total 152 [2021-11-09 09:45:50,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711964249] [2021-11-09 09:45:50,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2021-11-09 09:45:50,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:50,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-11-09 09:45:50,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=22244, Unknown=0, NotChecked=0, Total=22952 [2021-11-09 09:45:50,365 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 152 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 152 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:47,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:49:47,237 INFO L93 Difference]: Finished difference Result 343 states and 375 transitions. [2021-11-09 09:49:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-11-09 09:49:47,238 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 152 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-09 09:49:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:49:47,239 INFO L225 Difference]: With dead ends: 343 [2021-11-09 09:49:47,239 INFO L226 Difference]: Without dead ends: 263 [2021-11-09 09:49:47,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25818 ImplicationChecksByTransitivity, 235.5s TimeCoverageRelationStatistics Valid=2449, Invalid=83082, Unknown=25, NotChecked=0, Total=85556 [2021-11-09 09:49:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-09 09:49:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 183. [2021-11-09 09:49:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.0934065934065933) internal successors, (199), 182 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 199 transitions. [2021-11-09 09:49:47,267 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 199 transitions. Word has length 95 [2021-11-09 09:49:47,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:49:47,268 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 199 transitions. [2021-11-09 09:49:47,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 152 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:47,268 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 199 transitions. [2021-11-09 09:49:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 09:49:47,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:49:47,270 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:49:47,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:49:47,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:49:47,479 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:49:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:49:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1175667574, now seen corresponding path program 10 times [2021-11-09 09:49:47,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:49:47,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835872358] [2021-11-09 09:49:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:49:47,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:49:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-09 09:49:47,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:49:47,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835872358] [2021-11-09 09:49:47,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835872358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:47,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083703012] [2021-11-09 09:49:47,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:49:47,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:49:47,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:49:47,658 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:49:47,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:49:48,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:49:48,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:49:48,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:49:48,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:49:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-09 09:49:48,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083703012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:48,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:49:48,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-09 09:49:48,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806474141] [2021-11-09 09:49:48,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:49:48,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:48,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:49:48,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:49:48,694 INFO L87 Difference]: Start difference. First operand 183 states and 199 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:49:49,394 INFO L93 Difference]: Finished difference Result 352 states and 385 transitions. [2021-11-09 09:49:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:49:49,395 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-09 09:49:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:49:49,396 INFO L225 Difference]: With dead ends: 352 [2021-11-09 09:49:49,396 INFO L226 Difference]: Without dead ends: 196 [2021-11-09 09:49:49,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:49:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-09 09:49:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 172. [2021-11-09 09:49:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.087719298245614) internal successors, (186), 171 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2021-11-09 09:49:49,407 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 97 [2021-11-09 09:49:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:49:49,407 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2021-11-09 09:49:49,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2021-11-09 09:49:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-09 09:49:49,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:49:49,409 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:49:49,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:49:49,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:49:49,609 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:49:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:49:49,609 INFO L85 PathProgramCache]: Analyzing trace with hash 356238296, now seen corresponding path program 11 times [2021-11-09 09:49:49,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:49:49,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901769829] [2021-11-09 09:49:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:49:49,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:49:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-09 09:49:49,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:49:49,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901769829] [2021-11-09 09:49:49,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901769829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:49,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044147272] [2021-11-09 09:49:49,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:49:49,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:49:49,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:49:49,779 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:49:49,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:49:50,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:49:50,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:49:50,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:49:50,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:49:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-09 09:49:50,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044147272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:50,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:49:50,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-09 09:49:50,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032089140] [2021-11-09 09:49:50,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:49:50,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:50,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:49:50,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:49:50,971 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:51,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:49:51,689 INFO L93 Difference]: Finished difference Result 186 states and 200 transitions. [2021-11-09 09:49:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:49:51,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-09 09:49:51,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:49:51,690 INFO L225 Difference]: With dead ends: 186 [2021-11-09 09:49:51,690 INFO L226 Difference]: Without dead ends: 122 [2021-11-09 09:49:51,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:49:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-09 09:49:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2021-11-09 09:49:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.079646017699115) internal successors, (122), 113 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2021-11-09 09:49:51,700 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 99 [2021-11-09 09:49:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:49:51,700 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2021-11-09 09:49:51,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2021-11-09 09:49:51,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-09 09:49:51,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:49:51,701 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:49:51,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:49:51,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:49:51,907 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:49:51,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:49:51,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1362635270, now seen corresponding path program 12 times [2021-11-09 09:49:51,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:49:51,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419144823] [2021-11-09 09:49:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:49:51,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:49:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 4 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:11,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:11,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419144823] [2021-11-09 09:50:11,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419144823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:11,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145387324] [2021-11-09 09:50:11,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:50:11,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:11,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:11,919 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:11,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:50:12,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 09:50:12,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:50:12,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 185 conjunts are in the unsatisfiable core [2021-11-09 09:50:12,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:13,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:51:17,492 INFO L354 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2021-11-09 09:51:17,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 40 [2021-11-09 09:51:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 5 proven. 216 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:51:19,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145387324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:19,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:19,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 91] total 187 [2021-11-09 09:51:19,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792669003] [2021-11-09 09:51:19,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 187 states [2021-11-09 09:51:19,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:19,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 187 interpolants. [2021-11-09 09:51:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=34070, Unknown=0, NotChecked=0, Total=34782 [2021-11-09 09:51:19,033 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 187 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 187 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:10,221 INFO L93 Difference]: Finished difference Result 232 states and 253 transitions. [2021-11-09 09:55:10,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-09 09:55:10,222 INFO L78 Accepts]: Start accepts. Automaton has has 187 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 187 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-09 09:55:10,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:10,223 INFO L225 Difference]: With dead ends: 232 [2021-11-09 09:55:10,223 INFO L226 Difference]: Without dead ends: 228 [2021-11-09 09:55:10,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17206 ImplicationChecksByTransitivity, 247.9s TimeCoverageRelationStatistics Valid=2469, Invalid=85420, Unknown=23, NotChecked=0, Total=87912 [2021-11-09 09:55:10,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-09 09:55:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 191. [2021-11-09 09:55:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0842105263157895) internal successors, (206), 190 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 206 transitions. [2021-11-09 09:55:10,252 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 206 transitions. Word has length 113 [2021-11-09 09:55:10,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:10,253 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 206 transitions. [2021-11-09 09:55:10,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 187 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 187 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:10,253 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 206 transitions. [2021-11-09 09:55:10,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-09 09:55:10,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:10,255 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:10,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:10,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:10,471 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:55:10,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1548943064, now seen corresponding path program 13 times [2021-11-09 09:55:10,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:55:10,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468331574] [2021-11-09 09:55:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:10,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:55:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-09 09:55:10,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:55:10,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468331574] [2021-11-09 09:55:10,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468331574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:10,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713512276] [2021-11-09 09:55:10,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:55:10,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:10,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:55:10,762 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:55:10,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:55:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:55:11,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-09 09:55:12,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713512276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:12,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:55:12,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:55:12,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942110958] [2021-11-09 09:55:12,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:55:12,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:55:12,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:55:12,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:55:12,389 INFO L87 Difference]: Start difference. First operand 191 states and 206 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:13,204 INFO L93 Difference]: Finished difference Result 413 states and 448 transitions. [2021-11-09 09:55:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:55:13,204 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-09 09:55:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:13,205 INFO L225 Difference]: With dead ends: 413 [2021-11-09 09:55:13,206 INFO L226 Difference]: Without dead ends: 226 [2021-11-09 09:55:13,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:55:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-09 09:55:13,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 202. [2021-11-09 09:55:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0746268656716418) internal successors, (216), 201 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 216 transitions. [2021-11-09 09:55:13,222 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 216 transitions. Word has length 115 [2021-11-09 09:55:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:13,222 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 216 transitions. [2021-11-09 09:55:13,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 216 transitions. [2021-11-09 09:55:13,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-09 09:55:13,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:13,223 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:13,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:13,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:55:13,424 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:55:13,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:13,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1257919222, now seen corresponding path program 14 times [2021-11-09 09:55:13,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:55:13,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275454041] [2021-11-09 09:55:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:13,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:55:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-09 09:55:13,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:55:13,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275454041] [2021-11-09 09:55:13,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275454041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:13,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597698619] [2021-11-09 09:55:13,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:55:13,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:13,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:55:13,675 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:55:13,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:55:14,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:55:14,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:55:14,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:55:14,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-09 09:55:15,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597698619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:15,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:55:15,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:55:15,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606524807] [2021-11-09 09:55:15,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:55:15,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:55:15,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:55:15,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:55:15,329 INFO L87 Difference]: Start difference. First operand 202 states and 216 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:16,174 INFO L93 Difference]: Finished difference Result 216 states and 230 transitions. [2021-11-09 09:55:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:55:16,175 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-09 09:55:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:16,179 INFO L225 Difference]: With dead ends: 216 [2021-11-09 09:55:16,179 INFO L226 Difference]: Without dead ends: 140 [2021-11-09 09:55:16,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:55:16,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-09 09:55:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2021-11-09 09:55:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0687022900763359) internal successors, (140), 131 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2021-11-09 09:55:16,191 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 117 [2021-11-09 09:55:16,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:16,191 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2021-11-09 09:55:16,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2021-11-09 09:55:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-09 09:55:16,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:16,193 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:16,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:16,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:55:16,417 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:55:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:16,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1520659528, now seen corresponding path program 15 times [2021-11-09 09:55:16,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:55:16,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676816599] [2021-11-09 09:55:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:16,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:55:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 19 proven. 305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:55:41,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:55:41,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676816599] [2021-11-09 09:55:41,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676816599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:41,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504647279] [2021-11-09 09:55:41,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:55:41,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:41,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:55:41,723 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:55:41,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44c5fb12-bffe-4c1d-83d4-358d05c22b73/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:55:42,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 09:55:42,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:55:42,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 224 conjunts are in the unsatisfiable core [2021-11-09 09:55:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:43,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:55:43,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:55:43,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27