./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-ticket-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-ticket-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9aa17fef9ac46070b7bee497b29e6b2bfca553e9cde26e85393d7783524fde38 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:16:25,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:16:25,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:16:25,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:16:25,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:16:25,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:16:25,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:16:25,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:16:25,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:16:25,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:16:25,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:16:25,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:16:25,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:16:25,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:16:25,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:16:25,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:16:25,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:16:25,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:16:25,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:16:25,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:16:25,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:16:25,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:16:25,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:16:25,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:16:25,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:16:25,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:16:25,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:16:25,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:16:25,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:16:25,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:16:25,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:16:25,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:16:25,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:16:25,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:16:25,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:16:25,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:16:25,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:16:25,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:16:25,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:16:25,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:16:25,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:16:25,617 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 11:16:25,667 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:16:25,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:16:25,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:16:25,670 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:16:25,670 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:16:25,671 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:16:25,671 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:16:25,671 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:16:25,672 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:16:25,672 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:16:25,673 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:16:25,674 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:16:25,674 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:16:25,674 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:16:25,674 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:16:25,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:16:25,676 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:16:25,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:16:25,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:16:25,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:16:25,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:16:25,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:16:25,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:16:25,678 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:16:25,678 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:16:25,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:16:25,679 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:16:25,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:16:25,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:16:25,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:16:25,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:16:25,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:16:25,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:16:25,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:16:25,683 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:16:25,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:16:25,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:16:25,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:16:25,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:16:25,685 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aa17fef9ac46070b7bee497b29e6b2bfca553e9cde26e85393d7783524fde38 [2021-10-24 11:16:26,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:16:26,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:16:26,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:16:26,066 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:16:26,067 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:16:26,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/weaver/parallel-ticket-3.wvr.c [2021-10-24 11:16:26,150 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/data/72e1027f3/0ef826f9f9d1408f8139b0e44a3e70b0/FLAG815ee586d [2021-10-24 11:16:26,823 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:16:26,829 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/sv-benchmarks/c/weaver/parallel-ticket-3.wvr.c [2021-10-24 11:16:26,847 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/data/72e1027f3/0ef826f9f9d1408f8139b0e44a3e70b0/FLAG815ee586d [2021-10-24 11:16:27,119 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/data/72e1027f3/0ef826f9f9d1408f8139b0e44a3e70b0 [2021-10-24 11:16:27,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:16:27,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:16:27,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:16:27,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:16:27,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:16:27,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:16:27" (1/1) ... [2021-10-24 11:16:27,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@111204c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27, skipping insertion in model container [2021-10-24 11:16:27,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:16:27" (1/1) ... [2021-10-24 11:16:27,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:16:27,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:16:27,457 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_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/sv-benchmarks/c/weaver/parallel-ticket-3.wvr.c[2529,2542] [2021-10-24 11:16:27,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:16:27,472 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:16:27,500 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_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/sv-benchmarks/c/weaver/parallel-ticket-3.wvr.c[2529,2542] [2021-10-24 11:16:27,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:16:27,521 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:16:27,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27 WrapperNode [2021-10-24 11:16:27,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:16:27,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:16:27,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:16:27,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:16:27,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27" (1/1) ... [2021-10-24 11:16:27,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27" (1/1) ... [2021-10-24 11:16:27,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:16:27,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:16:27,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:16:27,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:16:27,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27" (1/1) ... [2021-10-24 11:16:27,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27" (1/1) ... [2021-10-24 11:16:27,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27" (1/1) ... [2021-10-24 11:16:27,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27" (1/1) ... [2021-10-24 11:16:27,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27" (1/1) ... [2021-10-24 11:16:27,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27" (1/1) ... [2021-10-24 11:16:27,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27" (1/1) ... [2021-10-24 11:16:27,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:16:27,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:16:27,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:16:27,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:16:27,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27" (1/1) ... [2021-10-24 11:16:27,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:16:27,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:16:27,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:16:27,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:16:27,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-24 11:16:27,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-24 11:16:27,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-24 11:16:27,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-24 11:16:27,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-24 11:16:27,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-24 11:16:27,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 11:16:27,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:16:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-24 11:16:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-24 11:16:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-24 11:16:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:16:27,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:16:27,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-24 11:16:27,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 11:16:27,758 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-24 11:16:28,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:16:28,273 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-24 11:16:28,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:16:28 BoogieIcfgContainer [2021-10-24 11:16:28,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:16:28,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:16:28,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:16:28,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:16:28,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:16:27" (1/3) ... [2021-10-24 11:16:28,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a5b60e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:16:28, skipping insertion in model container [2021-10-24 11:16:28,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:27" (2/3) ... [2021-10-24 11:16:28,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a5b60e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:16:28, skipping insertion in model container [2021-10-24 11:16:28,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:16:28" (3/3) ... [2021-10-24 11:16:28,288 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-ticket-3.wvr.c [2021-10-24 11:16:28,295 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-24 11:16:28,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:16:28,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 11:16:28,296 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-24 11:16:28,347 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,348 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,348 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,349 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,349 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,350 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,350 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,350 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,351 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,351 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,351 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,352 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,352 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,352 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,353 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,354 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,354 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,354 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,355 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,355 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,355 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,356 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,356 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,356 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,357 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,358 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,358 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,359 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,359 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,359 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,376 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,376 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,377 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,377 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,377 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,377 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,378 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,378 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,379 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,380 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,380 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,380 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,381 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,381 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,381 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,382 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,382 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,382 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,383 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,384 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,384 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,385 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,385 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,385 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,386 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,386 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,386 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,387 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,387 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,387 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,388 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,388 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,389 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,389 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,390 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,390 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,390 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,391 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,391 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,391 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,392 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,392 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,409 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,409 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,410 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,410 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,410 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,410 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,414 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,415 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,415 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,416 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,416 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,416 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,419 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,419 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,420 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,420 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,420 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,421 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-24 11:16:28,447 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-24 11:16:28,535 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:16:28,552 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 11:16:28,555 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-24 11:16:28,595 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-24 11:16:28,616 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 132 transitions, 288 flow [2021-10-24 11:16:28,620 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 132 transitions, 288 flow [2021-10-24 11:16:28,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 137 places, 132 transitions, 288 flow [2021-10-24 11:16:28,770 INFO L129 PetriNetUnfolder]: 5/129 cut-off events. [2021-10-24 11:16:28,771 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-24 11:16:28,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 129 events. 5/129 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 98 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2021-10-24 11:16:28,785 INFO L116 LiptonReduction]: Number of co-enabled transitions 2032 [2021-10-24 11:16:34,991 INFO L131 LiptonReduction]: Checked pairs total: 6055 [2021-10-24 11:16:34,991 INFO L133 LiptonReduction]: Total number of compositions: 113 [2021-10-24 11:16:35,015 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 34 transitions, 92 flow [2021-10-24 11:16:35,121 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 690 states, 689 states have (on average 3.036284470246734) internal successors, (2092), 689 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:35,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 690 states, 689 states have (on average 3.036284470246734) internal successors, (2092), 689 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-24 11:16:35,157 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:35,158 INFO L512 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] [2021-10-24 11:16:35,159 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:35,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:35,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1454676914, now seen corresponding path program 1 times [2021-10-24 11:16:35,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:35,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278417211] [2021-10-24 11:16:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:35,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:35,445 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:35,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278417211] [2021-10-24 11:16:35,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278417211] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:35,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:35,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:16:35,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917830708] [2021-10-24 11:16:35,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 11:16:35,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:35,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 11:16:35,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:16:35,493 INFO L87 Difference]: Start difference. First operand has 690 states, 689 states have (on average 3.036284470246734) internal successors, (2092), 689 states have internal predecessors, (2092), 0 states have call successors, (0), 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 12.5) internal successors, (25), 2 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) [2021-10-24 11:16:35,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:35,569 INFO L93 Difference]: Finished difference Result 690 states and 1994 transitions. [2021-10-24 11:16:35,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 11:16:35,571 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 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 [2021-10-24 11:16:35,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:35,610 INFO L225 Difference]: With dead ends: 690 [2021-10-24 11:16:35,611 INFO L226 Difference]: Without dead ends: 690 [2021-10-24 11:16:35,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:16:35,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-10-24 11:16:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2021-10-24 11:16:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.8940493468795356) internal successors, (1994), 689 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1994 transitions. [2021-10-24 11:16:35,795 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1994 transitions. Word has length 25 [2021-10-24 11:16:35,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:35,797 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1994 transitions. [2021-10-24 11:16:35,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 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) [2021-10-24 11:16:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1994 transitions. [2021-10-24 11:16:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:35,807 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:35,808 INFO L512 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] [2021-10-24 11:16:35,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 11:16:35,809 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:35,810 INFO L82 PathProgramCache]: Analyzing trace with hash 954248746, now seen corresponding path program 1 times [2021-10-24 11:16:35,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:35,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941027237] [2021-10-24 11:16:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:35,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:36,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:36,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941027237] [2021-10-24 11:16:36,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941027237] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:36,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:36,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-24 11:16:36,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194435163] [2021-10-24 11:16:36,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:16:36,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:36,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:16:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:16:36,379 INFO L87 Difference]: Start difference. First operand 690 states and 1994 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:36,645 INFO L93 Difference]: Finished difference Result 1026 states and 3118 transitions. [2021-10-24 11:16:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:16:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:36,663 INFO L225 Difference]: With dead ends: 1026 [2021-10-24 11:16:36,664 INFO L226 Difference]: Without dead ends: 1026 [2021-10-24 11:16:36,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:16:36,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-10-24 11:16:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 786. [2021-10-24 11:16:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.927388535031847) internal successors, (2298), 785 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2298 transitions. [2021-10-24 11:16:36,722 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2298 transitions. Word has length 29 [2021-10-24 11:16:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:36,724 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 2298 transitions. [2021-10-24 11:16:36,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2298 transitions. [2021-10-24 11:16:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:36,730 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:36,730 INFO L512 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] [2021-10-24 11:16:36,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 11:16:36,731 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:36,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:36,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1386473238, now seen corresponding path program 2 times [2021-10-24 11:16:36,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:36,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660346899] [2021-10-24 11:16:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:36,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:37,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:37,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660346899] [2021-10-24 11:16:37,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660346899] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:37,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:37,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-24 11:16:37,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685029228] [2021-10-24 11:16:37,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 11:16:37,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:37,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 11:16:37,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-24 11:16:37,084 INFO L87 Difference]: Start difference. First operand 786 states and 2298 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:37,357 INFO L93 Difference]: Finished difference Result 1044 states and 3143 transitions. [2021-10-24 11:16:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 11:16:37,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:37,382 INFO L225 Difference]: With dead ends: 1044 [2021-10-24 11:16:37,383 INFO L226 Difference]: Without dead ends: 994 [2021-10-24 11:16:37,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-10-24 11:16:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 754. [2021-10-24 11:16:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.903054448871182) internal successors, (2186), 753 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:37,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2186 transitions. [2021-10-24 11:16:37,430 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2186 transitions. Word has length 29 [2021-10-24 11:16:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:37,431 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2186 transitions. [2021-10-24 11:16:37,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2186 transitions. [2021-10-24 11:16:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:37,454 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:37,454 INFO L512 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] [2021-10-24 11:16:37,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 11:16:37,455 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:37,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:37,456 INFO L82 PathProgramCache]: Analyzing trace with hash -338575992, now seen corresponding path program 3 times [2021-10-24 11:16:37,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:37,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578532615] [2021-10-24 11:16:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:37,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:37,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:37,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578532615] [2021-10-24 11:16:37,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578532615] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:37,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:37,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-24 11:16:37,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245935998] [2021-10-24 11:16:37,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 11:16:37,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:37,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 11:16:37,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:16:37,650 INFO L87 Difference]: Start difference. First operand 754 states and 2186 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:37,817 INFO L93 Difference]: Finished difference Result 882 states and 2574 transitions. [2021-10-24 11:16:37,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:16:37,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:37,827 INFO L225 Difference]: With dead ends: 882 [2021-10-24 11:16:37,828 INFO L226 Difference]: Without dead ends: 882 [2021-10-24 11:16:37,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-24 11:16:37,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-10-24 11:16:37,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2021-10-24 11:16:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.9216799091940975) internal successors, (2574), 881 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2574 transitions. [2021-10-24 11:16:37,877 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2574 transitions. Word has length 29 [2021-10-24 11:16:37,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:37,877 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2574 transitions. [2021-10-24 11:16:37,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:37,878 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2574 transitions. [2021-10-24 11:16:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:37,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:37,884 INFO L512 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] [2021-10-24 11:16:37,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 11:16:37,885 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:37,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:37,888 INFO L82 PathProgramCache]: Analyzing trace with hash -224736078, now seen corresponding path program 4 times [2021-10-24 11:16:37,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:37,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801939763] [2021-10-24 11:16:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:37,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:38,133 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:38,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801939763] [2021-10-24 11:16:38,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801939763] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:38,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:38,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-24 11:16:38,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213654291] [2021-10-24 11:16:38,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:16:38,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:38,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:16:38,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:16:38,139 INFO L87 Difference]: Start difference. First operand 882 states and 2574 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:38,320 INFO L93 Difference]: Finished difference Result 916 states and 2625 transitions. [2021-10-24 11:16:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:16:38,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:38,330 INFO L225 Difference]: With dead ends: 916 [2021-10-24 11:16:38,331 INFO L226 Difference]: Without dead ends: 826 [2021-10-24 11:16:38,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:16:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-10-24 11:16:38,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2021-10-24 11:16:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.892121212121212) internal successors, (2386), 825 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2386 transitions. [2021-10-24 11:16:38,375 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2386 transitions. Word has length 29 [2021-10-24 11:16:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:38,376 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 2386 transitions. [2021-10-24 11:16:38,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2386 transitions. [2021-10-24 11:16:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:38,383 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:38,384 INFO L512 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] [2021-10-24 11:16:38,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-24 11:16:38,384 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1874715464, now seen corresponding path program 5 times [2021-10-24 11:16:38,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:38,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838742763] [2021-10-24 11:16:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:38,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:38,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:38,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838742763] [2021-10-24 11:16:38,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838742763] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:38,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:38,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:38,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201006863] [2021-10-24 11:16:38,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:38,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:38,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:38,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:38,637 INFO L87 Difference]: Start difference. First operand 826 states and 2386 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:38,913 INFO L93 Difference]: Finished difference Result 786 states and 2199 transitions. [2021-10-24 11:16:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 11:16:38,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:38,923 INFO L225 Difference]: With dead ends: 786 [2021-10-24 11:16:38,924 INFO L226 Difference]: Without dead ends: 740 [2021-10-24 11:16:38,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:16:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-10-24 11:16:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 738. [2021-10-24 11:16:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.8303934871099052) internal successors, (2086), 737 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2086 transitions. [2021-10-24 11:16:38,964 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2086 transitions. Word has length 29 [2021-10-24 11:16:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:38,964 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 2086 transitions. [2021-10-24 11:16:38,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2086 transitions. [2021-10-24 11:16:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:38,969 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:38,969 INFO L512 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] [2021-10-24 11:16:38,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-24 11:16:38,969 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:38,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1904211004, now seen corresponding path program 6 times [2021-10-24 11:16:38,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:38,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021617601] [2021-10-24 11:16:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:38,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:39,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:39,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021617601] [2021-10-24 11:16:39,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021617601] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:39,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:39,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 11:16:39,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029261053] [2021-10-24 11:16:39,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 11:16:39,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 11:16:39,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:16:39,223 INFO L87 Difference]: Start difference. First operand 738 states and 2086 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:39,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:39,354 INFO L93 Difference]: Finished difference Result 1045 states and 2911 transitions. [2021-10-24 11:16:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:16:39,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:39,365 INFO L225 Difference]: With dead ends: 1045 [2021-10-24 11:16:39,366 INFO L226 Difference]: Without dead ends: 710 [2021-10-24 11:16:39,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:16:39,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-10-24 11:16:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 710. [2021-10-24 11:16:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.757404795486601) internal successors, (1955), 709 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1955 transitions. [2021-10-24 11:16:39,413 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1955 transitions. Word has length 29 [2021-10-24 11:16:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:39,414 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 1955 transitions. [2021-10-24 11:16:39,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1955 transitions. [2021-10-24 11:16:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:39,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:39,418 INFO L512 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] [2021-10-24 11:16:39,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-24 11:16:39,419 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:39,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:39,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1150274804, now seen corresponding path program 7 times [2021-10-24 11:16:39,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:39,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596207871] [2021-10-24 11:16:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:39,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:39,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:39,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596207871] [2021-10-24 11:16:39,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596207871] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:39,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:39,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:39,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317465072] [2021-10-24 11:16:39,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:39,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:39,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:39,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:39,620 INFO L87 Difference]: Start difference. First operand 710 states and 1955 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:40,030 INFO L93 Difference]: Finished difference Result 978 states and 2534 transitions. [2021-10-24 11:16:40,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-24 11:16:40,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:40,065 INFO L225 Difference]: With dead ends: 978 [2021-10-24 11:16:40,066 INFO L226 Difference]: Without dead ends: 924 [2021-10-24 11:16:40,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-10-24 11:16:40,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-10-24 11:16:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 744. [2021-10-24 11:16:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 2.72678331090175) internal successors, (2026), 743 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2026 transitions. [2021-10-24 11:16:40,105 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2026 transitions. Word has length 29 [2021-10-24 11:16:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:40,105 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2026 transitions. [2021-10-24 11:16:40,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2026 transitions. [2021-10-24 11:16:40,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:40,109 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:40,109 INFO L512 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] [2021-10-24 11:16:40,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-24 11:16:40,110 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:40,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:40,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1175131616, now seen corresponding path program 8 times [2021-10-24 11:16:40,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:40,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404677989] [2021-10-24 11:16:40,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:40,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:40,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:40,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404677989] [2021-10-24 11:16:40,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404677989] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:40,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:40,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:40,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919919223] [2021-10-24 11:16:40,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:40,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:40,277 INFO L87 Difference]: Start difference. First operand 744 states and 2026 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:40,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:40,523 INFO L93 Difference]: Finished difference Result 760 states and 2053 transitions. [2021-10-24 11:16:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 11:16:40,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:40,531 INFO L225 Difference]: With dead ends: 760 [2021-10-24 11:16:40,532 INFO L226 Difference]: Without dead ends: 742 [2021-10-24 11:16:40,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:16:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-10-24 11:16:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 736. [2021-10-24 11:16:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.7319727891156464) internal successors, (2008), 735 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2008 transitions. [2021-10-24 11:16:40,572 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2008 transitions. Word has length 29 [2021-10-24 11:16:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:40,572 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2008 transitions. [2021-10-24 11:16:40,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2008 transitions. [2021-10-24 11:16:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:40,577 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:40,577 INFO L512 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] [2021-10-24 11:16:40,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-24 11:16:40,578 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:40,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1778046766, now seen corresponding path program 9 times [2021-10-24 11:16:40,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:40,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560096223] [2021-10-24 11:16:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:40,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:40,791 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:40,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560096223] [2021-10-24 11:16:40,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560096223] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:40,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:40,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:40,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342999046] [2021-10-24 11:16:40,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:40,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:40,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:40,794 INFO L87 Difference]: Start difference. First operand 736 states and 2008 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:40,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:40,973 INFO L93 Difference]: Finished difference Result 752 states and 2034 transitions. [2021-10-24 11:16:40,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:16:40,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:40,983 INFO L225 Difference]: With dead ends: 752 [2021-10-24 11:16:40,983 INFO L226 Difference]: Without dead ends: 732 [2021-10-24 11:16:40,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-24 11:16:40,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-10-24 11:16:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 730. [2021-10-24 11:16:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.7338820301783264) internal successors, (1993), 729 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1993 transitions. [2021-10-24 11:16:41,019 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1993 transitions. Word has length 29 [2021-10-24 11:16:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:41,019 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1993 transitions. [2021-10-24 11:16:41,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1993 transitions. [2021-10-24 11:16:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:41,023 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:41,024 INFO L512 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] [2021-10-24 11:16:41,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-24 11:16:41,024 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:41,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:41,025 INFO L82 PathProgramCache]: Analyzing trace with hash 361912820, now seen corresponding path program 10 times [2021-10-24 11:16:41,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:41,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901455911] [2021-10-24 11:16:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:41,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:41,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:41,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901455911] [2021-10-24 11:16:41,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901455911] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:41,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:41,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:41,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005846408] [2021-10-24 11:16:41,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:41,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:41,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:41,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:41,214 INFO L87 Difference]: Start difference. First operand 730 states and 1993 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:41,741 INFO L93 Difference]: Finished difference Result 808 states and 1931 transitions. [2021-10-24 11:16:41,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-24 11:16:41,742 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:41,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:41,750 INFO L225 Difference]: With dead ends: 808 [2021-10-24 11:16:41,751 INFO L226 Difference]: Without dead ends: 656 [2021-10-24 11:16:41,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-10-24 11:16:41,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-10-24 11:16:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 578. [2021-10-24 11:16:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.4471403812824954) internal successors, (1412), 577 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1412 transitions. [2021-10-24 11:16:41,781 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1412 transitions. Word has length 29 [2021-10-24 11:16:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:41,782 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1412 transitions. [2021-10-24 11:16:41,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1412 transitions. [2021-10-24 11:16:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:41,785 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:41,785 INFO L512 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] [2021-10-24 11:16:41,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-24 11:16:41,785 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:41,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:41,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1500886082, now seen corresponding path program 11 times [2021-10-24 11:16:41,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:41,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196047349] [2021-10-24 11:16:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:41,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:41,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:41,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196047349] [2021-10-24 11:16:41,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196047349] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:41,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:41,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:41,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050340791] [2021-10-24 11:16:41,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:41,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:41,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:41,969 INFO L87 Difference]: Start difference. First operand 578 states and 1412 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:42,171 INFO L93 Difference]: Finished difference Result 592 states and 1435 transitions. [2021-10-24 11:16:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:16:42,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:42,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:42,177 INFO L225 Difference]: With dead ends: 592 [2021-10-24 11:16:42,177 INFO L226 Difference]: Without dead ends: 562 [2021-10-24 11:16:42,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-24 11:16:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-10-24 11:16:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-10-24 11:16:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.449197860962567) internal successors, (1374), 561 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1374 transitions. [2021-10-24 11:16:42,203 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1374 transitions. Word has length 29 [2021-10-24 11:16:42,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:42,203 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1374 transitions. [2021-10-24 11:16:42,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1374 transitions. [2021-10-24 11:16:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:42,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:42,206 INFO L512 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] [2021-10-24 11:16:42,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-24 11:16:42,207 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:42,207 INFO L82 PathProgramCache]: Analyzing trace with hash -379621264, now seen corresponding path program 12 times [2021-10-24 11:16:42,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:42,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340724092] [2021-10-24 11:16:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:42,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:42,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:42,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340724092] [2021-10-24 11:16:42,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340724092] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:42,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:42,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-24 11:16:42,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195783185] [2021-10-24 11:16:42,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:16:42,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:42,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:16:42,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:16:42,335 INFO L87 Difference]: Start difference. First operand 562 states and 1374 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:42,604 INFO L93 Difference]: Finished difference Result 662 states and 1571 transitions. [2021-10-24 11:16:42,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-24 11:16:42,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:42,611 INFO L225 Difference]: With dead ends: 662 [2021-10-24 11:16:42,611 INFO L226 Difference]: Without dead ends: 650 [2021-10-24 11:16:42,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:16:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-10-24 11:16:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 562. [2021-10-24 11:16:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.445632798573975) internal successors, (1372), 561 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1372 transitions. [2021-10-24 11:16:42,639 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1372 transitions. Word has length 29 [2021-10-24 11:16:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:42,640 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1372 transitions. [2021-10-24 11:16:42,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1372 transitions. [2021-10-24 11:16:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:42,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:42,643 INFO L512 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] [2021-10-24 11:16:42,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-24 11:16:42,643 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1508034450, now seen corresponding path program 13 times [2021-10-24 11:16:42,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:42,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890422721] [2021-10-24 11:16:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:42,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:42,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:42,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890422721] [2021-10-24 11:16:42,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890422721] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:42,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:42,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-24 11:16:42,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105474383] [2021-10-24 11:16:42,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:16:42,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:42,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:16:42,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:16:42,804 INFO L87 Difference]: Start difference. First operand 562 states and 1372 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:43,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:43,095 INFO L93 Difference]: Finished difference Result 662 states and 1569 transitions. [2021-10-24 11:16:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-24 11:16:43,096 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:43,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:43,102 INFO L225 Difference]: With dead ends: 662 [2021-10-24 11:16:43,102 INFO L226 Difference]: Without dead ends: 634 [2021-10-24 11:16:43,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:16:43,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-10-24 11:16:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 558. [2021-10-24 11:16:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 2.443447037701975) internal successors, (1361), 557 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1361 transitions. [2021-10-24 11:16:43,129 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1361 transitions. Word has length 29 [2021-10-24 11:16:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:43,129 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 1361 transitions. [2021-10-24 11:16:43,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1361 transitions. [2021-10-24 11:16:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:43,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:43,133 INFO L512 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] [2021-10-24 11:16:43,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-24 11:16:43,134 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:43,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:43,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2003154918, now seen corresponding path program 14 times [2021-10-24 11:16:43,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:43,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812672291] [2021-10-24 11:16:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:43,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:43,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:43,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812672291] [2021-10-24 11:16:43,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812672291] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:43,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:43,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-24 11:16:43,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155105875] [2021-10-24 11:16:43,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:16:43,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:16:43,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:16:43,308 INFO L87 Difference]: Start difference. First operand 558 states and 1361 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:43,645 INFO L93 Difference]: Finished difference Result 690 states and 1644 transitions. [2021-10-24 11:16:43,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-24 11:16:43,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:43,653 INFO L225 Difference]: With dead ends: 690 [2021-10-24 11:16:43,654 INFO L226 Difference]: Without dead ends: 678 [2021-10-24 11:16:43,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-24 11:16:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-10-24 11:16:43,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 554. [2021-10-24 11:16:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.4430379746835444) internal successors, (1351), 553 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1351 transitions. [2021-10-24 11:16:43,682 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1351 transitions. Word has length 29 [2021-10-24 11:16:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:43,682 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1351 transitions. [2021-10-24 11:16:43,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1351 transitions. [2021-10-24 11:16:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:43,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:43,686 INFO L512 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] [2021-10-24 11:16:43,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-24 11:16:43,686 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:43,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:43,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2028011730, now seen corresponding path program 15 times [2021-10-24 11:16:43,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:43,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158859074] [2021-10-24 11:16:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:43,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:43,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:43,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158859074] [2021-10-24 11:16:43,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158859074] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:43,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:43,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:43,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618761340] [2021-10-24 11:16:43,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:43,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:43,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:43,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:43,822 INFO L87 Difference]: Start difference. First operand 554 states and 1351 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:44,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:44,187 INFO L93 Difference]: Finished difference Result 688 states and 1637 transitions. [2021-10-24 11:16:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-24 11:16:44,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:44,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:44,194 INFO L225 Difference]: With dead ends: 688 [2021-10-24 11:16:44,194 INFO L226 Difference]: Without dead ends: 676 [2021-10-24 11:16:44,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-10-24 11:16:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-10-24 11:16:44,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 552. [2021-10-24 11:16:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.442831215970962) internal successors, (1346), 551 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:44,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1346 transitions. [2021-10-24 11:16:44,222 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1346 transitions. Word has length 29 [2021-10-24 11:16:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:44,223 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1346 transitions. [2021-10-24 11:16:44,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1346 transitions. [2021-10-24 11:16:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:44,226 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:44,226 INFO L512 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] [2021-10-24 11:16:44,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-24 11:16:44,227 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1368350754, now seen corresponding path program 16 times [2021-10-24 11:16:44,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:44,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833771436] [2021-10-24 11:16:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:44,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:44,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:44,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833771436] [2021-10-24 11:16:44,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833771436] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:44,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:44,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-24 11:16:44,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635971665] [2021-10-24 11:16:44,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:16:44,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:44,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:16:44,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:16:44,393 INFO L87 Difference]: Start difference. First operand 552 states and 1346 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:44,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:44,728 INFO L93 Difference]: Finished difference Result 688 states and 1637 transitions. [2021-10-24 11:16:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-24 11:16:44,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:44,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:44,735 INFO L225 Difference]: With dead ends: 688 [2021-10-24 11:16:44,735 INFO L226 Difference]: Without dead ends: 664 [2021-10-24 11:16:44,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-24 11:16:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-10-24 11:16:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 540. [2021-10-24 11:16:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.4471243042671613) internal successors, (1319), 539 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:44,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1319 transitions. [2021-10-24 11:16:44,760 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1319 transitions. Word has length 29 [2021-10-24 11:16:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:44,760 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 1319 transitions. [2021-10-24 11:16:44,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:44,760 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1319 transitions. [2021-10-24 11:16:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:44,763 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:44,763 INFO L512 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] [2021-10-24 11:16:44,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-24 11:16:44,764 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:44,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:44,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1063817640, now seen corresponding path program 17 times [2021-10-24 11:16:44,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:44,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109180593] [2021-10-24 11:16:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:44,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:44,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:44,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109180593] [2021-10-24 11:16:44,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109180593] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:44,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:44,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:44,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688055807] [2021-10-24 11:16:44,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:44,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:44,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:44,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:44,889 INFO L87 Difference]: Start difference. First operand 540 states and 1319 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:45,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:45,249 INFO L93 Difference]: Finished difference Result 676 states and 1610 transitions. [2021-10-24 11:16:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-24 11:16:45,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:45,256 INFO L225 Difference]: With dead ends: 676 [2021-10-24 11:16:45,256 INFO L226 Difference]: Without dead ends: 642 [2021-10-24 11:16:45,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-10-24 11:16:45,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-10-24 11:16:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 518. [2021-10-24 11:16:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.473887814313346) internal successors, (1279), 517 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1279 transitions. [2021-10-24 11:16:45,280 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1279 transitions. Word has length 29 [2021-10-24 11:16:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:45,281 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1279 transitions. [2021-10-24 11:16:45,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1279 transitions. [2021-10-24 11:16:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:45,284 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:45,284 INFO L512 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] [2021-10-24 11:16:45,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-24 11:16:45,285 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:45,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1021323362, now seen corresponding path program 18 times [2021-10-24 11:16:45,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:45,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118451784] [2021-10-24 11:16:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:45,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:45,399 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:45,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118451784] [2021-10-24 11:16:45,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118451784] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:45,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:45,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-24 11:16:45,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816569224] [2021-10-24 11:16:45,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:16:45,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:16:45,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:16:45,402 INFO L87 Difference]: Start difference. First operand 518 states and 1279 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:45,578 INFO L93 Difference]: Finished difference Result 404 states and 936 transitions. [2021-10-24 11:16:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:16:45,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:45,582 INFO L225 Difference]: With dead ends: 404 [2021-10-24 11:16:45,582 INFO L226 Difference]: Without dead ends: 324 [2021-10-24 11:16:45,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-24 11:16:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-10-24 11:16:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2021-10-24 11:16:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.3157894736842106) internal successors, (748), 323 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 748 transitions. [2021-10-24 11:16:45,597 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 748 transitions. Word has length 29 [2021-10-24 11:16:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:45,598 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 748 transitions. [2021-10-24 11:16:45,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:45,598 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 748 transitions. [2021-10-24 11:16:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:45,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:45,600 INFO L512 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] [2021-10-24 11:16:45,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-24 11:16:45,601 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:45,601 INFO L82 PathProgramCache]: Analyzing trace with hash 100174420, now seen corresponding path program 19 times [2021-10-24 11:16:45,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:45,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951976989] [2021-10-24 11:16:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:45,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:45,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:45,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951976989] [2021-10-24 11:16:45,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951976989] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:45,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:45,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:45,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002479895] [2021-10-24 11:16:45,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:45,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:45,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:45,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:45,757 INFO L87 Difference]: Start difference. First operand 324 states and 748 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:46,000 INFO L93 Difference]: Finished difference Result 342 states and 775 transitions. [2021-10-24 11:16:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 11:16:46,001 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:46,004 INFO L225 Difference]: With dead ends: 342 [2021-10-24 11:16:46,004 INFO L226 Difference]: Without dead ends: 326 [2021-10-24 11:16:46,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:16:46,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-10-24 11:16:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 324. [2021-10-24 11:16:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.2972136222910216) internal successors, (742), 323 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 742 transitions. [2021-10-24 11:16:46,018 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 742 transitions. Word has length 29 [2021-10-24 11:16:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:46,019 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 742 transitions. [2021-10-24 11:16:46,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 742 transitions. [2021-10-24 11:16:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:46,021 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:46,021 INFO L512 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] [2021-10-24 11:16:46,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-24 11:16:46,022 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:46,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1871259744, now seen corresponding path program 20 times [2021-10-24 11:16:46,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:46,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228630169] [2021-10-24 11:16:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:46,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:46,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:46,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228630169] [2021-10-24 11:16:46,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228630169] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:46,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:46,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-24 11:16:46,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327795913] [2021-10-24 11:16:46,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:16:46,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:16:46,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:16:46,175 INFO L87 Difference]: Start difference. First operand 324 states and 742 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:46,460 INFO L93 Difference]: Finished difference Result 396 states and 892 transitions. [2021-10-24 11:16:46,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 11:16:46,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:46,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:46,464 INFO L225 Difference]: With dead ends: 396 [2021-10-24 11:16:46,464 INFO L226 Difference]: Without dead ends: 384 [2021-10-24 11:16:46,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:16:46,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-10-24 11:16:46,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 326. [2021-10-24 11:16:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.292307692307692) internal successors, (745), 325 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:46,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 745 transitions. [2021-10-24 11:16:46,480 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 745 transitions. Word has length 29 [2021-10-24 11:16:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:46,482 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 745 transitions. [2021-10-24 11:16:46,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 745 transitions. [2021-10-24 11:16:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:46,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:46,484 INFO L512 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] [2021-10-24 11:16:46,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-24 11:16:46,485 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:46,486 INFO L82 PathProgramCache]: Analyzing trace with hash -558818706, now seen corresponding path program 21 times [2021-10-24 11:16:46,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:46,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373753846] [2021-10-24 11:16:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:46,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:46,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:46,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373753846] [2021-10-24 11:16:46,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373753846] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:46,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:46,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:46,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021784899] [2021-10-24 11:16:46,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:46,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:46,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:46,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:46,618 INFO L87 Difference]: Start difference. First operand 326 states and 745 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:46,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:46,938 INFO L93 Difference]: Finished difference Result 394 states and 885 transitions. [2021-10-24 11:16:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-24 11:16:46,939 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:46,943 INFO L225 Difference]: With dead ends: 394 [2021-10-24 11:16:46,943 INFO L226 Difference]: Without dead ends: 376 [2021-10-24 11:16:46,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-24 11:16:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-10-24 11:16:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 318. [2021-10-24 11:16:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2933753943217665) internal successors, (727), 317 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 727 transitions. [2021-10-24 11:16:46,958 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 727 transitions. Word has length 29 [2021-10-24 11:16:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:46,959 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 727 transitions. [2021-10-24 11:16:46,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:46,960 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 727 transitions. [2021-10-24 11:16:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:46,961 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:46,962 INFO L512 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] [2021-10-24 11:16:46,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-24 11:16:46,962 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:46,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:46,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2036232328, now seen corresponding path program 22 times [2021-10-24 11:16:46,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:46,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61169812] [2021-10-24 11:16:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:46,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:47,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:47,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61169812] [2021-10-24 11:16:47,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61169812] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:47,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:47,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:47,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542720382] [2021-10-24 11:16:47,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:47,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:47,085 INFO L87 Difference]: Start difference. First operand 318 states and 727 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:47,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:47,382 INFO L93 Difference]: Finished difference Result 344 states and 768 transitions. [2021-10-24 11:16:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-24 11:16:47,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:47,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:47,385 INFO L225 Difference]: With dead ends: 344 [2021-10-24 11:16:47,386 INFO L226 Difference]: Without dead ends: 324 [2021-10-24 11:16:47,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-24 11:16:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-10-24 11:16:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 312. [2021-10-24 11:16:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.289389067524116) internal successors, (712), 311 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 712 transitions. [2021-10-24 11:16:47,402 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 712 transitions. Word has length 29 [2021-10-24 11:16:47,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:47,402 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 712 transitions. [2021-10-24 11:16:47,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 712 transitions. [2021-10-24 11:16:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:47,405 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:47,405 INFO L512 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] [2021-10-24 11:16:47,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-24 11:16:47,406 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:47,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2043547132, now seen corresponding path program 23 times [2021-10-24 11:16:47,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:47,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975395848] [2021-10-24 11:16:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:47,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:47,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:47,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975395848] [2021-10-24 11:16:47,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975395848] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:47,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:47,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-24 11:16:47,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343544697] [2021-10-24 11:16:47,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:16:47,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:47,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:16:47,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:16:47,518 INFO L87 Difference]: Start difference. First operand 312 states and 712 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:47,791 INFO L93 Difference]: Finished difference Result 358 states and 805 transitions. [2021-10-24 11:16:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 11:16:47,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:47,804 INFO L225 Difference]: With dead ends: 358 [2021-10-24 11:16:47,804 INFO L226 Difference]: Without dead ends: 340 [2021-10-24 11:16:47,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:16:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-10-24 11:16:47,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 314. [2021-10-24 11:16:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2843450479233227) internal successors, (715), 313 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 715 transitions. [2021-10-24 11:16:47,818 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 715 transitions. Word has length 29 [2021-10-24 11:16:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:47,819 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 715 transitions. [2021-10-24 11:16:47,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:47,819 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 715 transitions. [2021-10-24 11:16:47,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:47,820 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:47,820 INFO L512 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] [2021-10-24 11:16:47,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-24 11:16:47,820 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:47,821 INFO L82 PathProgramCache]: Analyzing trace with hash 145352174, now seen corresponding path program 24 times [2021-10-24 11:16:47,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:47,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111082670] [2021-10-24 11:16:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:47,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:47,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:47,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111082670] [2021-10-24 11:16:47,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111082670] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:47,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:47,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:47,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750432409] [2021-10-24 11:16:47,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:47,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:47,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:47,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:47,953 INFO L87 Difference]: Start difference. First operand 314 states and 715 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:48,239 INFO L93 Difference]: Finished difference Result 328 states and 738 transitions. [2021-10-24 11:16:48,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-24 11:16:48,244 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:48,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:48,250 INFO L225 Difference]: With dead ends: 328 [2021-10-24 11:16:48,251 INFO L226 Difference]: Without dead ends: 306 [2021-10-24 11:16:48,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-10-24 11:16:48,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-10-24 11:16:48,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2021-10-24 11:16:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.2852459016393443) internal successors, (697), 305 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 697 transitions. [2021-10-24 11:16:48,287 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 697 transitions. Word has length 29 [2021-10-24 11:16:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:48,288 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 697 transitions. [2021-10-24 11:16:48,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 697 transitions. [2021-10-24 11:16:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:48,290 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:48,291 INFO L512 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] [2021-10-24 11:16:48,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-24 11:16:48,291 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:48,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1644500820, now seen corresponding path program 25 times [2021-10-24 11:16:48,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:48,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200518479] [2021-10-24 11:16:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:48,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:48,448 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:48,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200518479] [2021-10-24 11:16:48,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200518479] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:48,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:48,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-24 11:16:48,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802039278] [2021-10-24 11:16:48,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:16:48,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:48,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:16:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:16:48,453 INFO L87 Difference]: Start difference. First operand 306 states and 697 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:48,622 INFO L93 Difference]: Finished difference Result 348 states and 782 transitions. [2021-10-24 11:16:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:16:48,623 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:48,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:48,626 INFO L225 Difference]: With dead ends: 348 [2021-10-24 11:16:48,626 INFO L226 Difference]: Without dead ends: 336 [2021-10-24 11:16:48,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-24 11:16:48,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-10-24 11:16:48,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 306. [2021-10-24 11:16:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.278688524590164) internal successors, (695), 305 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 695 transitions. [2021-10-24 11:16:48,639 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 695 transitions. Word has length 29 [2021-10-24 11:16:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:48,640 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 695 transitions. [2021-10-24 11:16:48,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 695 transitions. [2021-10-24 11:16:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:48,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:48,642 INFO L512 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] [2021-10-24 11:16:48,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-24 11:16:48,643 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:48,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:48,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1320490360, now seen corresponding path program 26 times [2021-10-24 11:16:48,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:48,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552139006] [2021-10-24 11:16:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:48,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:48,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:48,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552139006] [2021-10-24 11:16:48,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552139006] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:48,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:48,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-24 11:16:48,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105293176] [2021-10-24 11:16:48,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:16:48,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:48,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:16:48,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:16:48,749 INFO L87 Difference]: Start difference. First operand 306 states and 695 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:48,961 INFO L93 Difference]: Finished difference Result 348 states and 780 transitions. [2021-10-24 11:16:48,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:16:48,962 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:48,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:48,965 INFO L225 Difference]: With dead ends: 348 [2021-10-24 11:16:48,965 INFO L226 Difference]: Without dead ends: 328 [2021-10-24 11:16:48,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-24 11:16:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-10-24 11:16:48,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 304. [2021-10-24 11:16:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.277227722772277) internal successors, (690), 303 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 690 transitions. [2021-10-24 11:16:48,979 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 690 transitions. Word has length 29 [2021-10-24 11:16:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:48,980 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 690 transitions. [2021-10-24 11:16:48,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 690 transitions. [2021-10-24 11:16:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:48,982 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:48,982 INFO L512 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] [2021-10-24 11:16:48,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-24 11:16:48,983 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash 780902570, now seen corresponding path program 27 times [2021-10-24 11:16:48,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:48,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996897397] [2021-10-24 11:16:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:48,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:49,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:49,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996897397] [2021-10-24 11:16:49,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996897397] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:49,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:49,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-24 11:16:49,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351101524] [2021-10-24 11:16:49,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:16:49,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:49,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:16:49,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:16:49,118 INFO L87 Difference]: Start difference. First operand 304 states and 690 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:49,296 INFO L93 Difference]: Finished difference Result 312 states and 702 transitions. [2021-10-24 11:16:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:16:49,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:49,300 INFO L225 Difference]: With dead ends: 312 [2021-10-24 11:16:49,301 INFO L226 Difference]: Without dead ends: 300 [2021-10-24 11:16:49,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-24 11:16:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-10-24 11:16:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-10-24 11:16:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.274247491638796) internal successors, (680), 299 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 680 transitions. [2021-10-24 11:16:49,314 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 680 transitions. Word has length 29 [2021-10-24 11:16:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:49,314 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 680 transitions. [2021-10-24 11:16:49,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 680 transitions. [2021-10-24 11:16:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:49,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:49,316 INFO L512 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] [2021-10-24 11:16:49,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-24 11:16:49,317 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:49,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:49,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1649175880, now seen corresponding path program 28 times [2021-10-24 11:16:49,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:49,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144618925] [2021-10-24 11:16:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:49,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:49,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:49,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144618925] [2021-10-24 11:16:49,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144618925] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:49,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:49,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:49,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908398997] [2021-10-24 11:16:49,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:49,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:49,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:49,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:49,453 INFO L87 Difference]: Start difference. First operand 300 states and 680 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:49,631 INFO L93 Difference]: Finished difference Result 310 states and 695 transitions. [2021-10-24 11:16:49,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 11:16:49,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:49,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:49,634 INFO L225 Difference]: With dead ends: 310 [2021-10-24 11:16:49,634 INFO L226 Difference]: Without dead ends: 298 [2021-10-24 11:16:49,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-24 11:16:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-10-24 11:16:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-10-24 11:16:49,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.272727272727273) internal successors, (675), 297 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 675 transitions. [2021-10-24 11:16:49,647 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 675 transitions. Word has length 29 [2021-10-24 11:16:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:49,647 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 675 transitions. [2021-10-24 11:16:49,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 675 transitions. [2021-10-24 11:16:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:49,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:49,650 INFO L512 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] [2021-10-24 11:16:49,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-24 11:16:49,650 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:49,651 INFO L82 PathProgramCache]: Analyzing trace with hash -997497558, now seen corresponding path program 29 times [2021-10-24 11:16:49,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:49,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14423551] [2021-10-24 11:16:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:49,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:49,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:49,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14423551] [2021-10-24 11:16:49,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14423551] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:49,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:49,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-24 11:16:49,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6324583] [2021-10-24 11:16:49,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:16:49,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:49,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:16:49,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:16:49,763 INFO L87 Difference]: Start difference. First operand 298 states and 675 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:49,960 INFO L93 Difference]: Finished difference Result 310 states and 695 transitions. [2021-10-24 11:16:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:16:49,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:49,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:49,964 INFO L225 Difference]: With dead ends: 310 [2021-10-24 11:16:49,964 INFO L226 Difference]: Without dead ends: 292 [2021-10-24 11:16:49,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-24 11:16:49,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-10-24 11:16:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2021-10-24 11:16:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.268041237113402) internal successors, (660), 291 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 660 transitions. [2021-10-24 11:16:49,977 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 660 transitions. Word has length 29 [2021-10-24 11:16:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:49,977 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 660 transitions. [2021-10-24 11:16:49,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 660 transitions. [2021-10-24 11:16:49,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:49,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:49,980 INFO L512 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] [2021-10-24 11:16:49,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-24 11:16:49,980 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:49,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:49,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1191401748, now seen corresponding path program 30 times [2021-10-24 11:16:49,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:49,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303257909] [2021-10-24 11:16:49,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:49,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:50,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:50,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303257909] [2021-10-24 11:16:50,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303257909] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:50,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:50,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:50,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186106576] [2021-10-24 11:16:50,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:50,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:50,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:50,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:50,108 INFO L87 Difference]: Start difference. First operand 292 states and 660 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:50,317 INFO L93 Difference]: Finished difference Result 274 states and 619 transitions. [2021-10-24 11:16:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:16:50,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:50,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:50,321 INFO L225 Difference]: With dead ends: 274 [2021-10-24 11:16:50,321 INFO L226 Difference]: Without dead ends: 250 [2021-10-24 11:16:50,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:16:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-24 11:16:50,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2021-10-24 11:16:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.325301204819277) internal successors, (579), 249 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 579 transitions. [2021-10-24 11:16:50,333 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 579 transitions. Word has length 29 [2021-10-24 11:16:50,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:50,334 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 579 transitions. [2021-10-24 11:16:50,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 579 transitions. [2021-10-24 11:16:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:50,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:50,336 INFO L512 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] [2021-10-24 11:16:50,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-24 11:16:50,337 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:50,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:50,337 INFO L82 PathProgramCache]: Analyzing trace with hash 328426142, now seen corresponding path program 31 times [2021-10-24 11:16:50,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:50,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411617940] [2021-10-24 11:16:50,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:50,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:50,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:50,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411617940] [2021-10-24 11:16:50,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411617940] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:50,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:50,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-24 11:16:50,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606546554] [2021-10-24 11:16:50,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:16:50,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:50,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:16:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-24 11:16:50,515 INFO L87 Difference]: Start difference. First operand 250 states and 579 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:50,746 INFO L93 Difference]: Finished difference Result 298 states and 672 transitions. [2021-10-24 11:16:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 11:16:50,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:50,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:50,748 INFO L225 Difference]: With dead ends: 298 [2021-10-24 11:16:50,749 INFO L226 Difference]: Without dead ends: 278 [2021-10-24 11:16:50,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-24 11:16:50,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-24 11:16:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2021-10-24 11:16:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.2618181818181817) internal successors, (622), 275 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 622 transitions. [2021-10-24 11:16:50,762 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 622 transitions. Word has length 29 [2021-10-24 11:16:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:50,763 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 622 transitions. [2021-10-24 11:16:50,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 622 transitions. [2021-10-24 11:16:50,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-24 11:16:50,765 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:50,765 INFO L512 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] [2021-10-24 11:16:50,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-24 11:16:50,766 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-24 11:16:50,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash -307160290, now seen corresponding path program 32 times [2021-10-24 11:16:50,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:50,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540251087] [2021-10-24 11:16:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:50,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:50,852 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:50,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540251087] [2021-10-24 11:16:50,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540251087] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:50,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:50,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 11:16:50,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998061678] [2021-10-24 11:16:50,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 11:16:50,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:50,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 11:16:50,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:16:50,855 INFO L87 Difference]: Start difference. First operand 276 states and 622 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:50,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:50,883 INFO L93 Difference]: Finished difference Result 275 states and 621 transitions. [2021-10-24 11:16:50,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:16:50,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-24 11:16:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:50,884 INFO L225 Difference]: With dead ends: 275 [2021-10-24 11:16:50,884 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 11:16:50,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:16:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 11:16:50,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 11:16:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 11:16:50,886 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-10-24 11:16:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:50,886 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 11:16:50,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 11:16:50,887 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 11:16:50,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:16:50,891 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-24 11:16:50,892 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-24 11:16:50,892 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-24 11:16:50,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-24 11:16:50,898 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-24 11:16:50,898 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:16:50,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:16:50 BasicIcfg [2021-10-24 11:16:50,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:16:50,903 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:16:50,903 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:16:50,903 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:16:50,904 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:16:28" (3/4) ... [2021-10-24 11:16:50,908 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 11:16:50,916 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-24 11:16:50,916 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-24 11:16:50,916 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-24 11:16:50,925 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-24 11:16:50,926 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-24 11:16:50,926 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 11:16:50,927 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 11:16:50,987 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 11:16:50,987 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:16:50,990 INFO L168 Benchmark]: Toolchain (without parser) took 23863.45 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 60.4 MB in the beginning and 136.1 MB in the end (delta: -75.7 MB). Peak memory consumption was 40.0 MB. Max. memory is 16.1 GB. [2021-10-24 11:16:50,990 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 102.8 MB. Free memory is still 76.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:16:50,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 395.81 ms. Allocated memory is still 102.8 MB. Free memory was 60.2 MB in the beginning and 75.9 MB in the end (delta: -15.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:16:50,992 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.43 ms. Allocated memory is still 102.8 MB. Free memory was 75.9 MB in the beginning and 73.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:16:50,993 INFO L168 Benchmark]: Boogie Preprocessor took 71.03 ms. Allocated memory is still 102.8 MB. Free memory was 73.9 MB in the beginning and 72.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:16:50,993 INFO L168 Benchmark]: RCFGBuilder took 609.21 ms. Allocated memory is still 102.8 MB. Free memory was 72.6 MB in the beginning and 57.5 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 11:16:50,994 INFO L168 Benchmark]: TraceAbstraction took 22622.27 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 57.1 MB in the beginning and 139.2 MB in the end (delta: -82.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. [2021-10-24 11:16:50,994 INFO L168 Benchmark]: Witness Printer took 84.43 ms. Allocated memory is still 218.1 MB. Free memory was 139.2 MB in the beginning and 136.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:16:50,999 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 102.8 MB. Free memory is still 76.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 395.81 ms. Allocated memory is still 102.8 MB. Free memory was 60.2 MB in the beginning and 75.9 MB in the end (delta: -15.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.43 ms. Allocated memory is still 102.8 MB. Free memory was 75.9 MB in the beginning and 73.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 71.03 ms. Allocated memory is still 102.8 MB. Free memory was 73.9 MB in the beginning and 72.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 609.21 ms. Allocated memory is still 102.8 MB. Free memory was 72.6 MB in the beginning and 57.5 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22622.27 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 57.1 MB in the beginning and 139.2 MB in the end (delta: -82.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. * Witness Printer took 84.43 ms. Allocated memory is still 218.1 MB. Free memory was 139.2 MB in the beginning and 136.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6371.3ms, 137 PlacesBefore, 43 PlacesAfterwards, 132 TransitionsBefore, 34 TransitionsAfterwards, 2032 CoEnabledTransitionPairs, 7 FixpointIterations, 66 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 113 TotalNumberOfCompositions, 6055 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3153, positive: 2946, positive conditional: 0, positive unconditional: 2946, negative: 207, negative conditional: 0, negative unconditional: 207, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1468, positive: 1406, positive conditional: 0, positive unconditional: 1406, negative: 62, negative conditional: 0, negative unconditional: 62, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1468, positive: 1385, positive conditional: 0, positive unconditional: 1385, negative: 83, negative conditional: 0, negative unconditional: 83, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 83, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 62, negative conditional: 0, negative unconditional: 62, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 232, positive: 56, positive conditional: 0, positive unconditional: 56, negative: 176, negative conditional: 0, negative unconditional: 176, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3153, positive: 1540, positive conditional: 0, positive unconditional: 1540, negative: 145, negative conditional: 0, negative unconditional: 145, unknown: 1468, unknown conditional: 0, unknown unconditional: 1468] , Statistics on independence cache: Total cache size (in pairs): 209, Positive cache size: 183, Positive conditional cache size: 0, Positive unconditional cache size: 183, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 104]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 171 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 22363.9ms, OverallIterations: 33, TraceHistogramMax: 1, EmptinessCheckTime: 144.0ms, AutomataDifference: 8612.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6565.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1505 SDtfs, 1608 SDslu, 6248 SDs, 0 SdLazy, 5856 SolverSat, 361 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4244.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 442 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 3544.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=882occurred in iteration=4, InterpolantAutomatonStates: 370, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 967.1ms AutomataMinimizationTime, 33 MinimizatonAttempts, 1620 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 138.2ms SsaConstructionTime, 1820.6ms SatisfiabilityAnalysisTime, 3492.3ms InterpolantComputationTime, 953 NumberOfCodeBlocks, 953 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 920 ConstructedInterpolants, 0 QuantifiedInterpolants, 3332 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 33 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-24 11:16:51,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea4f14-5527-4c4f-9ca1-3bf527073da1/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...