./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:13:46,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:13:46,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:13:46,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:13:46,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:13:46,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:13:46,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:13:46,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:13:46,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:13:46,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:13:46,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:13:46,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:13:46,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:13:46,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:13:46,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:13:46,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:13:46,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:13:46,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:13:46,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:13:46,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:13:46,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:13:46,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:13:46,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:13:46,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:13:46,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:13:46,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:13:46,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:13:46,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:13:46,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:13:46,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:13:46,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:13:46,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:13:46,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:13:46,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:13:46,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:13:46,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:13:46,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:13:46,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:13:46,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:13:46,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:13:46,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:13:46,780 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:13:46,807 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:13:46,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:13:46,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:13:46,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:13:46,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:13:46,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:13:46,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:13:46,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:13:46,810 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:13:46,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:13:46,811 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:13:46,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:13:46,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:13:46,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:13:46,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:13:46,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:13:46,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:13:46,813 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:13:46,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:13:46,813 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:13:46,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:13:46,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:13:46,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:13:46,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:13:46,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:13:46,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:13:46,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:13:46,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:13:46,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:13:46,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:13:46,816 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:13:46,817 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:13:46,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:13:46,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 [2022-11-20 11:13:47,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:13:47,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:13:47,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:13:47,195 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:13:47,196 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:13:47,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2022-11-20 11:13:51,298 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:13:51,622 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:13:51,622 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2022-11-20 11:13:51,648 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/data/f27610a80/680cd8fd1db04f829e2312e31c9e38b7/FLAG7bb568eb2 [2022-11-20 11:13:51,672 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/data/f27610a80/680cd8fd1db04f829e2312e31c9e38b7 [2022-11-20 11:13:51,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:13:51,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:13:51,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:13:51,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:13:51,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:13:51,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:51" (1/1) ... [2022-11-20 11:13:51,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c3d213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51, skipping insertion in model container [2022-11-20 11:13:51,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:51" (1/1) ... [2022-11-20 11:13:51,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:13:51,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:13:51,981 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c[646,659] [2022-11-20 11:13:52,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:13:52,133 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:13:52,149 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c[646,659] [2022-11-20 11:13:52,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:13:52,255 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:13:52,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52 WrapperNode [2022-11-20 11:13:52,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:13:52,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:13:52,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:13:52,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:13:52,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52" (1/1) ... [2022-11-20 11:13:52,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52" (1/1) ... [2022-11-20 11:13:52,404 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 861 [2022-11-20 11:13:52,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:13:52,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:13:52,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:13:52,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:13:52,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52" (1/1) ... [2022-11-20 11:13:52,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52" (1/1) ... [2022-11-20 11:13:52,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52" (1/1) ... [2022-11-20 11:13:52,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52" (1/1) ... [2022-11-20 11:13:52,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52" (1/1) ... [2022-11-20 11:13:52,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52" (1/1) ... [2022-11-20 11:13:52,492 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52" (1/1) ... [2022-11-20 11:13:52,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52" (1/1) ... [2022-11-20 11:13:52,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:13:52,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:13:52,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:13:52,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:13:52,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52" (1/1) ... [2022-11-20 11:13:52,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:13:52,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:13:52,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:13:52,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:13:52,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:13:52,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:13:52,605 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-20 11:13:52,605 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-20 11:13:52,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:13:52,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:13:52,731 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:13:52,734 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:13:53,798 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:13:53,820 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:13:53,821 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-20 11:13:53,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:53 BoogieIcfgContainer [2022-11-20 11:13:53,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:13:53,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:13:53,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:13:53,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:13:53,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:13:51" (1/3) ... [2022-11-20 11:13:53,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aedbd0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:53, skipping insertion in model container [2022-11-20 11:13:53,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:52" (2/3) ... [2022-11-20 11:13:53,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aedbd0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:53, skipping insertion in model container [2022-11-20 11:13:53,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:53" (3/3) ... [2022-11-20 11:13:53,855 INFO L112 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.4.cil.c [2022-11-20 11:13:53,887 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:13:53,887 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:13:53,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:13:53,982 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6e496bb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:13:53,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:13:53,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 269 states have (on average 1.8550185873605949) internal successors, (499), 275 states have internal predecessors, (499), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:13:54,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 11:13:54,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:54,006 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:13:54,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:54,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash 193087539, now seen corresponding path program 1 times [2022-11-20 11:13:54,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:54,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057176465] [2022-11-20 11:13:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:54,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:54,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:54,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057176465] [2022-11-20 11:13:54,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057176465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:54,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:54,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:13:54,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050566023] [2022-11-20 11:13:54,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:54,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:13:54,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:54,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:13:54,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:54,501 INFO L87 Difference]: Start difference. First operand has 277 states, 269 states have (on average 1.8550185873605949) internal successors, (499), 275 states have internal predecessors, (499), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:55,203 INFO L93 Difference]: Finished difference Result 730 states and 1341 transitions. [2022-11-20 11:13:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:13:55,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 11:13:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:55,229 INFO L225 Difference]: With dead ends: 730 [2022-11-20 11:13:55,230 INFO L226 Difference]: Without dead ends: 450 [2022-11-20 11:13:55,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:55,240 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 267 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:55,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 789 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:13:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-20 11:13:55,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 437. [2022-11-20 11:13:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 431 states have (on average 1.6009280742459397) internal successors, (690), 435 states have internal predecessors, (690), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 695 transitions. [2022-11-20 11:13:55,338 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 695 transitions. Word has length 29 [2022-11-20 11:13:55,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:55,339 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 695 transitions. [2022-11-20 11:13:55,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:55,340 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 695 transitions. [2022-11-20 11:13:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 11:13:55,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:55,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:55,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:13:55,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:55,346 INFO L85 PathProgramCache]: Analyzing trace with hash 909656450, now seen corresponding path program 1 times [2022-11-20 11:13:55,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:55,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94216898] [2022-11-20 11:13:55,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:55,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:55,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:55,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94216898] [2022-11-20 11:13:55,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94216898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:55,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:55,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:13:55,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918232856] [2022-11-20 11:13:55,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:55,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:13:55,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:55,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:13:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:55,455 INFO L87 Difference]: Start difference. First operand 437 states and 695 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:55,658 INFO L93 Difference]: Finished difference Result 1149 states and 1853 transitions. [2022-11-20 11:13:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:13:55,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-20 11:13:55,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:55,666 INFO L225 Difference]: With dead ends: 1149 [2022-11-20 11:13:55,666 INFO L226 Difference]: Without dead ends: 726 [2022-11-20 11:13:55,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:55,681 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 330 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:55,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1032 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:13:55,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-11-20 11:13:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 713. [2022-11-20 11:13:55,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 707 states have (on average 1.6350777934936351) internal successors, (1156), 711 states have internal predecessors, (1156), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1161 transitions. [2022-11-20 11:13:55,789 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1161 transitions. Word has length 40 [2022-11-20 11:13:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:55,789 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 1161 transitions. [2022-11-20 11:13:55,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:55,790 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1161 transitions. [2022-11-20 11:13:55,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 11:13:55,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:55,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:55,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:13:55,794 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:55,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1642726185, now seen corresponding path program 1 times [2022-11-20 11:13:55,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:55,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147250017] [2022-11-20 11:13:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:55,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:55,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:55,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147250017] [2022-11-20 11:13:55,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147250017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:55,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:55,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:13:55,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536213666] [2022-11-20 11:13:55,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:55,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:13:55,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:55,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:13:55,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:55,985 INFO L87 Difference]: Start difference. First operand 713 states and 1161 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:56,082 INFO L93 Difference]: Finished difference Result 1793 states and 2916 transitions. [2022-11-20 11:13:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:13:56,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-20 11:13:56,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:56,094 INFO L225 Difference]: With dead ends: 1793 [2022-11-20 11:13:56,094 INFO L226 Difference]: Without dead ends: 1105 [2022-11-20 11:13:56,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:56,109 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 357 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:56,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 817 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:13:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-11-20 11:13:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1094. [2022-11-20 11:13:56,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1088 states have (on average 1.6231617647058822) internal successors, (1766), 1092 states have internal predecessors, (1766), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1771 transitions. [2022-11-20 11:13:56,196 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1771 transitions. Word has length 41 [2022-11-20 11:13:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:56,197 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 1771 transitions. [2022-11-20 11:13:56,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1771 transitions. [2022-11-20 11:13:56,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 11:13:56,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:56,214 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:56,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:13:56,215 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:56,227 INFO L85 PathProgramCache]: Analyzing trace with hash -49710902, now seen corresponding path program 1 times [2022-11-20 11:13:56,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:56,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152622169] [2022-11-20 11:13:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:56,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:56,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:56,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152622169] [2022-11-20 11:13:56,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152622169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:56,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:56,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:13:56,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34799615] [2022-11-20 11:13:56,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:56,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:13:56,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:56,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:13:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:13:56,455 INFO L87 Difference]: Start difference. First operand 1094 states and 1771 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:57,121 INFO L93 Difference]: Finished difference Result 3018 states and 4863 transitions. [2022-11-20 11:13:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:13:57,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-20 11:13:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:57,132 INFO L225 Difference]: With dead ends: 3018 [2022-11-20 11:13:57,133 INFO L226 Difference]: Without dead ends: 1949 [2022-11-20 11:13:57,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:13:57,146 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 588 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:57,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1586 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:13:57,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2022-11-20 11:13:57,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1716. [2022-11-20 11:13:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1710 states have (on average 1.5988304093567252) internal successors, (2734), 1714 states have internal predecessors, (2734), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2739 transitions. [2022-11-20 11:13:57,280 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2739 transitions. Word has length 48 [2022-11-20 11:13:57,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:57,281 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 2739 transitions. [2022-11-20 11:13:57,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2739 transitions. [2022-11-20 11:13:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 11:13:57,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:57,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:57,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:13:57,287 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1086798880, now seen corresponding path program 1 times [2022-11-20 11:13:57,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:57,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795471832] [2022-11-20 11:13:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:57,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:57,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:57,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795471832] [2022-11-20 11:13:57,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795471832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:57,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:57,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:13:57,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41858226] [2022-11-20 11:13:57,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:57,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:13:57,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:57,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:13:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:13:57,469 INFO L87 Difference]: Start difference. First operand 1716 states and 2739 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:58,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:58,304 INFO L93 Difference]: Finished difference Result 5101 states and 8048 transitions. [2022-11-20 11:13:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:13:58,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-20 11:13:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:58,321 INFO L225 Difference]: With dead ends: 5101 [2022-11-20 11:13:58,322 INFO L226 Difference]: Without dead ends: 3404 [2022-11-20 11:13:58,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:13:58,326 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 750 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:58,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1077 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:13:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2022-11-20 11:13:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 3026. [2022-11-20 11:13:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3020 states have (on average 1.57317880794702) internal successors, (4751), 3024 states have internal predecessors, (4751), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 4756 transitions. [2022-11-20 11:13:58,557 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 4756 transitions. Word has length 53 [2022-11-20 11:13:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:58,557 INFO L495 AbstractCegarLoop]: Abstraction has 3026 states and 4756 transitions. [2022-11-20 11:13:58,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 4756 transitions. [2022-11-20 11:13:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 11:13:58,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:58,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:58,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:13:58,561 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:58,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:58,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1057985257, now seen corresponding path program 1 times [2022-11-20 11:13:58,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:58,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933049754] [2022-11-20 11:13:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:58,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:58,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:58,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933049754] [2022-11-20 11:13:58,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933049754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:58,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:58,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:13:58,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429350077] [2022-11-20 11:13:58,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:58,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:13:58,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:58,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:13:58,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:58,626 INFO L87 Difference]: Start difference. First operand 3026 states and 4756 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:58,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:58,982 INFO L93 Difference]: Finished difference Result 7113 states and 11141 transitions. [2022-11-20 11:13:58,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:13:58,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-20 11:13:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:59,004 INFO L225 Difference]: With dead ends: 7113 [2022-11-20 11:13:59,004 INFO L226 Difference]: Without dead ends: 4110 [2022-11-20 11:13:59,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:59,012 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 372 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:59,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 720 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:13:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2022-11-20 11:13:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 3926. [2022-11-20 11:13:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3920 states have (on average 1.5543367346938775) internal successors, (6093), 3924 states have internal predecessors, (6093), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 6098 transitions. [2022-11-20 11:13:59,406 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 6098 transitions. Word has length 53 [2022-11-20 11:13:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:59,407 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 6098 transitions. [2022-11-20 11:13:59,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 6098 transitions. [2022-11-20 11:13:59,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 11:13:59,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:59,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:59,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:13:59,411 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1585990245, now seen corresponding path program 1 times [2022-11-20 11:13:59,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:59,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365153219] [2022-11-20 11:13:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:59,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:59,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:59,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365153219] [2022-11-20 11:13:59,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365153219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:59,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:59,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:13:59,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988610703] [2022-11-20 11:13:59,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:59,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:13:59,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:59,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:13:59,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:59,487 INFO L87 Difference]: Start difference. First operand 3926 states and 6098 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:00,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:00,286 INFO L93 Difference]: Finished difference Result 9442 states and 14788 transitions. [2022-11-20 11:14:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:00,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-20 11:14:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:00,315 INFO L225 Difference]: With dead ends: 9442 [2022-11-20 11:14:00,315 INFO L226 Difference]: Without dead ends: 5539 [2022-11-20 11:14:00,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:00,323 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 254 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:00,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 889 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:14:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2022-11-20 11:14:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 4758. [2022-11-20 11:14:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 4752 states have (on average 1.4983164983164983) internal successors, (7120), 4756 states have internal predecessors, (7120), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 7125 transitions. [2022-11-20 11:14:00,750 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 7125 transitions. Word has length 61 [2022-11-20 11:14:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:00,751 INFO L495 AbstractCegarLoop]: Abstraction has 4758 states and 7125 transitions. [2022-11-20 11:14:00,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 7125 transitions. [2022-11-20 11:14:00,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:14:00,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:00,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:00,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:14:00,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:00,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1564004079, now seen corresponding path program 1 times [2022-11-20 11:14:00,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:00,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297468259] [2022-11-20 11:14:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:00,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:00,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:00,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297468259] [2022-11-20 11:14:00,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297468259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:00,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:00,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:14:00,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572740861] [2022-11-20 11:14:00,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:00,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:14:00,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:00,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:14:00,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:00,878 INFO L87 Difference]: Start difference. First operand 4758 states and 7125 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:01,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:01,455 INFO L93 Difference]: Finished difference Result 9359 states and 14027 transitions. [2022-11-20 11:14:01,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:01,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-20 11:14:01,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:01,482 INFO L225 Difference]: With dead ends: 9359 [2022-11-20 11:14:01,483 INFO L226 Difference]: Without dead ends: 4624 [2022-11-20 11:14:01,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:01,496 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 349 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:01,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 447 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2022-11-20 11:14:01,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 4624. [2022-11-20 11:14:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4624 states, 4618 states have (on average 1.4766132524902555) internal successors, (6819), 4622 states have internal predecessors, (6819), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 6824 transitions. [2022-11-20 11:14:01,924 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 6824 transitions. Word has length 63 [2022-11-20 11:14:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:01,925 INFO L495 AbstractCegarLoop]: Abstraction has 4624 states and 6824 transitions. [2022-11-20 11:14:01,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 6824 transitions. [2022-11-20 11:14:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 11:14:01,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:01,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:01,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:14:01,935 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:01,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:01,935 INFO L85 PathProgramCache]: Analyzing trace with hash 357537147, now seen corresponding path program 1 times [2022-11-20 11:14:01,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:01,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251100075] [2022-11-20 11:14:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:01,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:02,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:02,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251100075] [2022-11-20 11:14:02,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251100075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:02,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:02,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:14:02,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055523634] [2022-11-20 11:14:02,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:02,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:14:02,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:02,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:14:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:02,069 INFO L87 Difference]: Start difference. First operand 4624 states and 6824 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:02,669 INFO L93 Difference]: Finished difference Result 9892 states and 14766 transitions. [2022-11-20 11:14:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:02,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-20 11:14:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:02,711 INFO L225 Difference]: With dead ends: 9892 [2022-11-20 11:14:02,712 INFO L226 Difference]: Without dead ends: 5291 [2022-11-20 11:14:02,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:02,721 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 313 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:02,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 1010 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2022-11-20 11:14:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 3550. [2022-11-20 11:14:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 3544 states have (on average 1.4923814898419865) internal successors, (5289), 3548 states have internal predecessors, (5289), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 5294 transitions. [2022-11-20 11:14:03,123 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 5294 transitions. Word has length 64 [2022-11-20 11:14:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:03,123 INFO L495 AbstractCegarLoop]: Abstraction has 3550 states and 5294 transitions. [2022-11-20 11:14:03,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 5294 transitions. [2022-11-20 11:14:03,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 11:14:03,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:03,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:03,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:14:03,127 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:03,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:03,127 INFO L85 PathProgramCache]: Analyzing trace with hash 550768718, now seen corresponding path program 1 times [2022-11-20 11:14:03,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:03,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183698513] [2022-11-20 11:14:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:03,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:03,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:03,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183698513] [2022-11-20 11:14:03,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183698513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:03,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:03,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:14:03,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780599064] [2022-11-20 11:14:03,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:03,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:14:03,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:03,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:14:03,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:03,254 INFO L87 Difference]: Start difference. First operand 3550 states and 5294 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:05,867 INFO L93 Difference]: Finished difference Result 16792 states and 24825 transitions. [2022-11-20 11:14:05,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:14:05,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-20 11:14:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:05,915 INFO L225 Difference]: With dead ends: 16792 [2022-11-20 11:14:05,915 INFO L226 Difference]: Without dead ends: 13467 [2022-11-20 11:14:05,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:14:05,926 INFO L413 NwaCegarLoop]: 1074 mSDtfsCounter, 2139 mSDsluCounter, 2969 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 4043 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:05,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2139 Valid, 4043 Invalid, 597 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:14:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2022-11-20 11:14:06,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 4420. [2022-11-20 11:14:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4414 states have (on average 1.4841413683733575) internal successors, (6551), 4418 states have internal predecessors, (6551), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 6556 transitions. [2022-11-20 11:14:06,613 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 6556 transitions. Word has length 66 [2022-11-20 11:14:06,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:06,614 INFO L495 AbstractCegarLoop]: Abstraction has 4420 states and 6556 transitions. [2022-11-20 11:14:06,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:06,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 6556 transitions. [2022-11-20 11:14:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:14:06,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:06,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:06,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:14:06,618 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:06,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1157262175, now seen corresponding path program 1 times [2022-11-20 11:14:06,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:06,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379396397] [2022-11-20 11:14:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:06,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:06,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:06,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379396397] [2022-11-20 11:14:06,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379396397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:06,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:06,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:14:06,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601265058] [2022-11-20 11:14:06,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:06,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:14:06,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:06,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:14:06,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:14:06,788 INFO L87 Difference]: Start difference. First operand 4420 states and 6556 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:11,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:11,365 INFO L93 Difference]: Finished difference Result 30445 states and 44831 transitions. [2022-11-20 11:14:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 11:14:11,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:14:11,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:11,457 INFO L225 Difference]: With dead ends: 30445 [2022-11-20 11:14:11,458 INFO L226 Difference]: Without dead ends: 26250 [2022-11-20 11:14:11,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:14:11,474 INFO L413 NwaCegarLoop]: 1885 mSDtfsCounter, 3833 mSDsluCounter, 6792 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3833 SdHoareTripleChecker+Valid, 8677 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:11,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3833 Valid, 8677 Invalid, 333 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:14:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26250 states. [2022-11-20 11:14:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26250 to 4730. [2022-11-20 11:14:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4730 states, 4724 states have (on average 1.4739627434377647) internal successors, (6963), 4728 states have internal predecessors, (6963), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 6968 transitions. [2022-11-20 11:14:12,485 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 6968 transitions. Word has length 67 [2022-11-20 11:14:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:12,486 INFO L495 AbstractCegarLoop]: Abstraction has 4730 states and 6968 transitions. [2022-11-20 11:14:12,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:12,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 6968 transitions. [2022-11-20 11:14:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 11:14:12,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:12,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:12,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:14:12,495 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:12,496 INFO L85 PathProgramCache]: Analyzing trace with hash 587846131, now seen corresponding path program 1 times [2022-11-20 11:14:12,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:12,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484176443] [2022-11-20 11:14:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:12,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:12,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484176443] [2022-11-20 11:14:12,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484176443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:12,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:12,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:14:12,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447150932] [2022-11-20 11:14:12,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:12,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:14:12,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:12,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:14:12,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:12,563 INFO L87 Difference]: Start difference. First operand 4730 states and 6968 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:13,500 INFO L93 Difference]: Finished difference Result 9971 states and 14664 transitions. [2022-11-20 11:14:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-20 11:14:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:13,516 INFO L225 Difference]: With dead ends: 9971 [2022-11-20 11:14:13,516 INFO L226 Difference]: Without dead ends: 5262 [2022-11-20 11:14:13,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:13,528 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 139 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:13,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 826 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:13,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5262 states. [2022-11-20 11:14:14,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5262 to 5188. [2022-11-20 11:14:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5188 states, 5182 states have (on average 1.4698957931300656) internal successors, (7617), 5186 states have internal predecessors, (7617), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:14,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 7622 transitions. [2022-11-20 11:14:14,291 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 7622 transitions. Word has length 79 [2022-11-20 11:14:14,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:14,291 INFO L495 AbstractCegarLoop]: Abstraction has 5188 states and 7622 transitions. [2022-11-20 11:14:14,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:14,292 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 7622 transitions. [2022-11-20 11:14:14,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 11:14:14,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:14,296 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:14,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:14:14,297 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash -880253353, now seen corresponding path program 1 times [2022-11-20 11:14:14,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:14,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524738849] [2022-11-20 11:14:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:14,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:14,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:14,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524738849] [2022-11-20 11:14:14,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524738849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:14,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:14,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:14:14,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615170572] [2022-11-20 11:14:14,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:14,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:14:14,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:14,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:14:14,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:14:14,390 INFO L87 Difference]: Start difference. First operand 5188 states and 7622 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:16,276 INFO L93 Difference]: Finished difference Result 13874 states and 20224 transitions. [2022-11-20 11:14:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:14:16,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-20 11:14:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:16,308 INFO L225 Difference]: With dead ends: 13874 [2022-11-20 11:14:16,309 INFO L226 Difference]: Without dead ends: 8585 [2022-11-20 11:14:16,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:14:16,321 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 654 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:16,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 1276 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:14:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2022-11-20 11:14:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 7651. [2022-11-20 11:14:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7651 states, 7645 states have (on average 1.4395029431000654) internal successors, (11005), 7649 states have internal predecessors, (11005), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7651 states to 7651 states and 11010 transitions. [2022-11-20 11:14:17,545 INFO L78 Accepts]: Start accepts. Automaton has 7651 states and 11010 transitions. Word has length 91 [2022-11-20 11:14:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:17,546 INFO L495 AbstractCegarLoop]: Abstraction has 7651 states and 11010 transitions. [2022-11-20 11:14:17,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:17,546 INFO L276 IsEmpty]: Start isEmpty. Operand 7651 states and 11010 transitions. [2022-11-20 11:14:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-20 11:14:17,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:17,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:17,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:14:17,551 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1094322202, now seen corresponding path program 1 times [2022-11-20 11:14:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:17,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417928379] [2022-11-20 11:14:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:17,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:17,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:17,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417928379] [2022-11-20 11:14:17,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417928379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:17,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:17,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:14:17,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162506606] [2022-11-20 11:14:17,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:17,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:14:17,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:14:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:17,628 INFO L87 Difference]: Start difference. First operand 7651 states and 11010 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:18,315 INFO L93 Difference]: Finished difference Result 11033 states and 15906 transitions. [2022-11-20 11:14:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:18,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-20 11:14:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:18,327 INFO L225 Difference]: With dead ends: 11033 [2022-11-20 11:14:18,327 INFO L226 Difference]: Without dead ends: 3385 [2022-11-20 11:14:18,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:18,339 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 343 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:18,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 525 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:18,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2022-11-20 11:14:18,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 3332. [2022-11-20 11:14:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3326 states have (on average 1.34996993385448) internal successors, (4490), 3330 states have internal predecessors, (4490), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 4495 transitions. [2022-11-20 11:14:18,794 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 4495 transitions. Word has length 99 [2022-11-20 11:14:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:18,795 INFO L495 AbstractCegarLoop]: Abstraction has 3332 states and 4495 transitions. [2022-11-20 11:14:18,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 4495 transitions. [2022-11-20 11:14:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-20 11:14:18,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:18,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:18,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:14:18,798 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:18,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1249050813, now seen corresponding path program 1 times [2022-11-20 11:14:18,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:18,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332529300] [2022-11-20 11:14:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:18,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:18,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:18,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332529300] [2022-11-20 11:14:18,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332529300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:18,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:18,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:14:18,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248874535] [2022-11-20 11:14:18,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:18,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:14:18,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:18,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:14:18,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:14:18,900 INFO L87 Difference]: Start difference. First operand 3332 states and 4495 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:20,316 INFO L93 Difference]: Finished difference Result 12736 states and 17172 transitions. [2022-11-20 11:14:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:14:20,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-20 11:14:20,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:20,343 INFO L225 Difference]: With dead ends: 12736 [2022-11-20 11:14:20,343 INFO L226 Difference]: Without dead ends: 9581 [2022-11-20 11:14:20,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:14:20,352 INFO L413 NwaCegarLoop]: 1086 mSDtfsCounter, 1549 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:20,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1549 Valid, 3412 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9581 states. [2022-11-20 11:14:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 3334. [2022-11-20 11:14:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3328 states have (on average 1.3479567307692308) internal successors, (4486), 3332 states have internal predecessors, (4486), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 4491 transitions. [2022-11-20 11:14:21,017 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 4491 transitions. Word has length 101 [2022-11-20 11:14:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:21,017 INFO L495 AbstractCegarLoop]: Abstraction has 3334 states and 4491 transitions. [2022-11-20 11:14:21,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 4491 transitions. [2022-11-20 11:14:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-20 11:14:21,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:21,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:21,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:14:21,031 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:21,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2071034270, now seen corresponding path program 1 times [2022-11-20 11:14:21,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:21,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713354117] [2022-11-20 11:14:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:21,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:21,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:21,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713354117] [2022-11-20 11:14:21,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713354117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:21,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635063228] [2022-11-20 11:14:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:21,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:21,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:21,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:21,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:14:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:21,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:14:21,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:14:21,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:21,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635063228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:21,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:14:21,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:14:21,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344820656] [2022-11-20 11:14:21,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:21,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:14:21,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:21,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:14:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:21,580 INFO L87 Difference]: Start difference. First operand 3334 states and 4491 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:22,211 INFO L93 Difference]: Finished difference Result 3977 states and 5352 transitions. [2022-11-20 11:14:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-11-20 11:14:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:22,220 INFO L225 Difference]: With dead ends: 3977 [2022-11-20 11:14:22,220 INFO L226 Difference]: Without dead ends: 3973 [2022-11-20 11:14:22,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:22,223 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 237 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:22,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 811 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:14:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2022-11-20 11:14:22,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3923. [2022-11-20 11:14:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3923 states, 3917 states have (on average 1.34516211386265) internal successors, (5269), 3921 states have internal predecessors, (5269), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3923 states to 3923 states and 5274 transitions. [2022-11-20 11:14:22,961 INFO L78 Accepts]: Start accepts. Automaton has 3923 states and 5274 transitions. Word has length 103 [2022-11-20 11:14:22,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:22,961 INFO L495 AbstractCegarLoop]: Abstraction has 3923 states and 5274 transitions. [2022-11-20 11:14:22,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:22,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3923 states and 5274 transitions. [2022-11-20 11:14:22,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-20 11:14:22,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:22,967 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:22,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:23,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:14:23,175 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:23,176 INFO L85 PathProgramCache]: Analyzing trace with hash -62225411, now seen corresponding path program 1 times [2022-11-20 11:14:23,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:23,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005443589] [2022-11-20 11:14:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:23,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:23,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:23,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005443589] [2022-11-20 11:14:23,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005443589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:23,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373272548] [2022-11-20 11:14:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:23,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:23,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:23,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:23,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:14:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:23,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:14:23,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:14:23,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:23,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373272548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:23,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:14:23,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:14:23,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748655939] [2022-11-20 11:14:23,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:23,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:14:23,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:14:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:23,683 INFO L87 Difference]: Start difference. First operand 3923 states and 5274 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:24,401 INFO L93 Difference]: Finished difference Result 6990 states and 9448 transitions. [2022-11-20 11:14:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:24,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2022-11-20 11:14:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:24,409 INFO L225 Difference]: With dead ends: 6990 [2022-11-20 11:14:24,409 INFO L226 Difference]: Without dead ends: 3072 [2022-11-20 11:14:24,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:24,418 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 268 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:24,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 426 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:14:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2022-11-20 11:14:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2850. [2022-11-20 11:14:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2844 states have (on average 1.3259493670886076) internal successors, (3771), 2848 states have internal predecessors, (3771), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3776 transitions. [2022-11-20 11:14:25,054 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3776 transitions. Word has length 159 [2022-11-20 11:14:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:25,054 INFO L495 AbstractCegarLoop]: Abstraction has 2850 states and 3776 transitions. [2022-11-20 11:14:25,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3776 transitions. [2022-11-20 11:14:25,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-20 11:14:25,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:25,060 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:25,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:25,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:14:25,267 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:25,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:25,268 INFO L85 PathProgramCache]: Analyzing trace with hash 397670283, now seen corresponding path program 1 times [2022-11-20 11:14:25,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:25,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10597963] [2022-11-20 11:14:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:25,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:14:25,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:25,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10597963] [2022-11-20 11:14:25,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10597963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:25,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908630665] [2022-11-20 11:14:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:25,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:25,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:25,575 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:25,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:14:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:25,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:14:25,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:14:25,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:25,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908630665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:25,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:14:25,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:14:25,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140864399] [2022-11-20 11:14:25,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:25,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:14:25,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:25,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:14:25,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:25,858 INFO L87 Difference]: Start difference. First operand 2850 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:26,699 INFO L93 Difference]: Finished difference Result 5528 states and 7365 transitions. [2022-11-20 11:14:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:26,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-11-20 11:14:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:26,705 INFO L225 Difference]: With dead ends: 5528 [2022-11-20 11:14:26,706 INFO L226 Difference]: Without dead ends: 2850 [2022-11-20 11:14:26,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:26,711 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 278 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:26,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 398 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:14:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2022-11-20 11:14:27,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2850. [2022-11-20 11:14:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2844 states have (on average 1.2921940928270041) internal successors, (3675), 2848 states have internal predecessors, (3675), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3680 transitions. [2022-11-20 11:14:27,171 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3680 transitions. Word has length 162 [2022-11-20 11:14:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:27,171 INFO L495 AbstractCegarLoop]: Abstraction has 2850 states and 3680 transitions. [2022-11-20 11:14:27,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3680 transitions. [2022-11-20 11:14:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-20 11:14:27,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:27,176 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:27,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 11:14:27,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:27,383 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:27,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:27,384 INFO L85 PathProgramCache]: Analyzing trace with hash -276776698, now seen corresponding path program 1 times [2022-11-20 11:14:27,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:27,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937311298] [2022-11-20 11:14:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:27,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:14:27,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:27,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937311298] [2022-11-20 11:14:27,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937311298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:27,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76851980] [2022-11-20 11:14:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:27,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:27,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:27,574 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:27,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:14:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:27,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:14:27,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:14:27,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:27,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76851980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:27,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:14:27,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:14:27,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995330973] [2022-11-20 11:14:27,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:27,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:14:27,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:27,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:14:27,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:27,797 INFO L87 Difference]: Start difference. First operand 2850 states and 3680 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:28,902 INFO L93 Difference]: Finished difference Result 6447 states and 8490 transitions. [2022-11-20 11:14:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:28,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-11-20 11:14:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:28,913 INFO L225 Difference]: With dead ends: 6447 [2022-11-20 11:14:28,913 INFO L226 Difference]: Without dead ends: 3769 [2022-11-20 11:14:28,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:28,923 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 209 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:28,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 674 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:14:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2022-11-20 11:14:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3681. [2022-11-20 11:14:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3675 states have (on average 1.2612244897959184) internal successors, (4635), 3679 states have internal predecessors, (4635), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 4640 transitions. [2022-11-20 11:14:29,697 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 4640 transitions. Word has length 163 [2022-11-20 11:14:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:29,698 INFO L495 AbstractCegarLoop]: Abstraction has 3681 states and 4640 transitions. [2022-11-20 11:14:29,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 4640 transitions. [2022-11-20 11:14:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-20 11:14:29,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:29,701 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:29,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:29,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:29,909 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:29,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:29,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1158970864, now seen corresponding path program 1 times [2022-11-20 11:14:29,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:29,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295980708] [2022-11-20 11:14:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:29,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:14:30,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:30,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295980708] [2022-11-20 11:14:30,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295980708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:30,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859135285] [2022-11-20 11:14:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:30,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:30,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:30,380 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:30,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:14:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:30,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:14:30,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:14:30,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:14:31,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859135285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:31,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:31,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-11-20 11:14:31,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522350437] [2022-11-20 11:14:31,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:31,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:14:31,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:31,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:14:31,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:14:31,373 INFO L87 Difference]: Start difference. First operand 3681 states and 4640 transitions. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:35,405 INFO L93 Difference]: Finished difference Result 18486 states and 23395 transitions. [2022-11-20 11:14:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 11:14:35,406 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-11-20 11:14:35,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:35,436 INFO L225 Difference]: With dead ends: 18486 [2022-11-20 11:14:35,436 INFO L226 Difference]: Without dead ends: 14977 [2022-11-20 11:14:35,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 339 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:14:35,448 INFO L413 NwaCegarLoop]: 879 mSDtfsCounter, 4189 mSDsluCounter, 4800 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4189 SdHoareTripleChecker+Valid, 5679 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:35,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4189 Valid, 5679 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:14:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14977 states. [2022-11-20 11:14:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14977 to 5218. [2022-11-20 11:14:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5218 states, 5212 states have (on average 1.266308518802763) internal successors, (6600), 5216 states have internal predecessors, (6600), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 6605 transitions. [2022-11-20 11:14:36,593 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 6605 transitions. Word has length 165 [2022-11-20 11:14:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:36,594 INFO L495 AbstractCegarLoop]: Abstraction has 5218 states and 6605 transitions. [2022-11-20 11:14:36,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:36,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 6605 transitions. [2022-11-20 11:14:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-20 11:14:36,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:36,601 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:36,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:36,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:36,809 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:36,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:36,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1576222772, now seen corresponding path program 1 times [2022-11-20 11:14:36,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:36,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121515319] [2022-11-20 11:14:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:36,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:14:37,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:37,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121515319] [2022-11-20 11:14:37,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121515319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:37,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013919610] [2022-11-20 11:14:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:37,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:37,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:37,550 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:37,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:14:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:37,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:14:37,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:14:38,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:14:39,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013919610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:39,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:39,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-11-20 11:14:39,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136555716] [2022-11-20 11:14:39,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:39,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:14:39,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:39,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:14:39,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:14:39,544 INFO L87 Difference]: Start difference. First operand 5218 states and 6605 transitions. Second operand has 11 states, 11 states have (on average 23.545454545454547) internal successors, (259), 11 states have internal predecessors, (259), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:45,248 INFO L93 Difference]: Finished difference Result 24064 states and 30364 transitions. [2022-11-20 11:14:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 11:14:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.545454545454547) internal successors, (259), 11 states have internal predecessors, (259), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2022-11-20 11:14:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:45,280 INFO L225 Difference]: With dead ends: 24064 [2022-11-20 11:14:45,280 INFO L226 Difference]: Without dead ends: 19018 [2022-11-20 11:14:45,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 543 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 11:14:45,292 INFO L413 NwaCegarLoop]: 1480 mSDtfsCounter, 5873 mSDsluCounter, 10268 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5873 SdHoareTripleChecker+Valid, 11748 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:45,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5873 Valid, 11748 Invalid, 894 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [94 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:14:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19018 states. [2022-11-20 11:14:46,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19018 to 6629. [2022-11-20 11:14:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 6623 states have (on average 1.2675524686697872) internal successors, (8395), 6627 states have internal predecessors, (8395), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 8400 transitions. [2022-11-20 11:14:46,829 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 8400 transitions. Word has length 265 [2022-11-20 11:14:46,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:46,830 INFO L495 AbstractCegarLoop]: Abstraction has 6629 states and 8400 transitions. [2022-11-20 11:14:46,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.545454545454547) internal successors, (259), 11 states have internal predecessors, (259), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 8400 transitions. [2022-11-20 11:14:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-11-20 11:14:46,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:46,841 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:46,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:47,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:14:47,049 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1321811141, now seen corresponding path program 1 times [2022-11-20 11:14:47,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:47,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048569013] [2022-11-20 11:14:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:47,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:14:48,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:48,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048569013] [2022-11-20 11:14:48,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048569013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:48,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210022929] [2022-11-20 11:14:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:48,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:48,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:48,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:48,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:14:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:48,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:14:48,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:14:49,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:14:50,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210022929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:50,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:50,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-11-20 11:14:50,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188885622] [2022-11-20 11:14:50,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:50,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:14:50,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:50,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:14:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:14:50,974 INFO L87 Difference]: Start difference. First operand 6629 states and 8400 transitions. Second operand has 13 states, 13 states have (on average 27.53846153846154) internal successors, (358), 13 states have internal predecessors, (358), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:58,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:58,540 INFO L93 Difference]: Finished difference Result 29720 states and 37445 transitions. [2022-11-20 11:14:58,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-20 11:14:58,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 27.53846153846154) internal successors, (358), 13 states have internal predecessors, (358), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 366 [2022-11-20 11:14:58,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:58,576 INFO L225 Difference]: With dead ends: 29720 [2022-11-20 11:14:58,577 INFO L226 Difference]: Without dead ends: 23263 [2022-11-20 11:14:58,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 749 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=315, Invalid=2655, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 11:14:58,592 INFO L413 NwaCegarLoop]: 2115 mSDtfsCounter, 7812 mSDsluCounter, 18760 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7812 SdHoareTripleChecker+Valid, 20875 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:58,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7812 Valid, 20875 Invalid, 1560 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [135 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 11:14:58,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23263 states. [2022-11-20 11:15:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23263 to 8042. [2022-11-20 11:15:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8042 states, 8036 states have (on average 1.2682926829268293) internal successors, (10192), 8040 states have internal predecessors, (10192), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8042 states to 8042 states and 10197 transitions. [2022-11-20 11:15:00,465 INFO L78 Accepts]: Start accepts. Automaton has 8042 states and 10197 transitions. Word has length 366 [2022-11-20 11:15:00,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:00,466 INFO L495 AbstractCegarLoop]: Abstraction has 8042 states and 10197 transitions. [2022-11-20 11:15:00,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 27.53846153846154) internal successors, (358), 13 states have internal predecessors, (358), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:00,466 INFO L276 IsEmpty]: Start isEmpty. Operand 8042 states and 10197 transitions. [2022-11-20 11:15:00,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-11-20 11:15:00,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:00,472 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:00,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:00,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:00,681 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:00,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1341756700, now seen corresponding path program 1 times [2022-11-20 11:15:00,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:00,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906794127] [2022-11-20 11:15:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:00,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 543 proven. 305 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:15:01,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:01,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906794127] [2022-11-20 11:15:01,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906794127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:01,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316991754] [2022-11-20 11:15:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:01,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:01,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:01,555 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:01,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:15:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:15:01,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 848 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:15:02,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:15:02,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316991754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:15:02,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:15:02,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 13 [2022-11-20 11:15:02,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917299795] [2022-11-20 11:15:02,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:15:02,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:15:02,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:02,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:15:02,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:15:02,727 INFO L87 Difference]: Start difference. First operand 8042 states and 10197 transitions. Second operand has 11 states, 11 states have (on average 41.63636363636363) internal successors, (458), 11 states have internal predecessors, (458), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:06,139 INFO L93 Difference]: Finished difference Result 18581 states and 23478 transitions. [2022-11-20 11:15:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:15:06,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 41.63636363636363) internal successors, (458), 11 states have internal predecessors, (458), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 468 [2022-11-20 11:15:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:06,154 INFO L225 Difference]: With dead ends: 18581 [2022-11-20 11:15:06,155 INFO L226 Difference]: Without dead ends: 10708 [2022-11-20 11:15:06,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:15:06,162 INFO L413 NwaCegarLoop]: 1656 mSDtfsCounter, 2844 mSDsluCounter, 4207 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2844 SdHoareTripleChecker+Valid, 5863 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:06,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2844 Valid, 5863 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:15:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2022-11-20 11:15:07,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 7911. [2022-11-20 11:15:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7911 states, 7905 states have (on average 1.267046173308033) internal successors, (10016), 7909 states have internal predecessors, (10016), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 10021 transitions. [2022-11-20 11:15:07,915 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 10021 transitions. Word has length 468 [2022-11-20 11:15:07,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:07,916 INFO L495 AbstractCegarLoop]: Abstraction has 7911 states and 10021 transitions. [2022-11-20 11:15:07,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 41.63636363636363) internal successors, (458), 11 states have internal predecessors, (458), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:07,916 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 10021 transitions. [2022-11-20 11:15:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-11-20 11:15:07,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:07,920 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:07,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:08,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 11:15:08,131 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:08,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:08,131 INFO L85 PathProgramCache]: Analyzing trace with hash 282578174, now seen corresponding path program 1 times [2022-11-20 11:15:08,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:08,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402663294] [2022-11-20 11:15:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:08,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2022-11-20 11:15:08,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:08,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402663294] [2022-11-20 11:15:08,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402663294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:15:08,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:15:08,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:15:08,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289953130] [2022-11-20 11:15:08,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:15:08,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:15:08,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:08,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:15:08,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:15:08,307 INFO L87 Difference]: Start difference. First operand 7911 states and 10021 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:09,214 INFO L93 Difference]: Finished difference Result 9564 states and 11908 transitions. [2022-11-20 11:15:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:15:09,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2022-11-20 11:15:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:09,218 INFO L225 Difference]: With dead ends: 9564 [2022-11-20 11:15:09,219 INFO L226 Difference]: Without dead ends: 1706 [2022-11-20 11:15:09,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:15:09,228 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 138 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:09,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 404 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:09,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2022-11-20 11:15:09,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1703. [2022-11-20 11:15:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1699 states have (on average 1.100058858151854) internal successors, (1869), 1701 states have internal predecessors, (1869), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 1872 transitions. [2022-11-20 11:15:09,731 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 1872 transitions. Word has length 469 [2022-11-20 11:15:09,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:09,732 INFO L495 AbstractCegarLoop]: Abstraction has 1703 states and 1872 transitions. [2022-11-20 11:15:09,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:09,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 1872 transitions. [2022-11-20 11:15:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-11-20 11:15:09,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:09,735 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:09,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 11:15:09,736 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:09,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:09,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1243077896, now seen corresponding path program 1 times [2022-11-20 11:15:09,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:09,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343508289] [2022-11-20 11:15:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:09,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2022-11-20 11:15:10,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:10,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343508289] [2022-11-20 11:15:10,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343508289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:15:10,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:15:10,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:15:10,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440131250] [2022-11-20 11:15:10,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:15:10,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:15:10,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:10,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:15:10,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:15:10,091 INFO L87 Difference]: Start difference. First operand 1703 states and 1872 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:11,448 INFO L93 Difference]: Finished difference Result 3488 states and 3862 transitions. [2022-11-20 11:15:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:15:11,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 470 [2022-11-20 11:15:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:11,453 INFO L225 Difference]: With dead ends: 3488 [2022-11-20 11:15:11,453 INFO L226 Difference]: Without dead ends: 2771 [2022-11-20 11:15:11,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:15:11,455 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 920 mSDsluCounter, 2011 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 2514 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:11,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 2514 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2022-11-20 11:15:12,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1697. [2022-11-20 11:15:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1693 states have (on average 1.0956881275841701) internal successors, (1855), 1695 states have internal predecessors, (1855), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 1858 transitions. [2022-11-20 11:15:12,116 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 1858 transitions. Word has length 470 [2022-11-20 11:15:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:12,117 INFO L495 AbstractCegarLoop]: Abstraction has 1697 states and 1858 transitions. [2022-11-20 11:15:12,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 1858 transitions. [2022-11-20 11:15:12,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-11-20 11:15:12,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:12,121 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:12,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 11:15:12,121 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:12,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1382591989, now seen corresponding path program 1 times [2022-11-20 11:15:12,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:12,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242841813] [2022-11-20 11:15:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2022-11-20 11:15:12,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:12,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242841813] [2022-11-20 11:15:12,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242841813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:15:12,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:15:12,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:15:12,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057485486] [2022-11-20 11:15:12,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:15:12,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:15:12,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:12,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:15:12,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:15:12,397 INFO L87 Difference]: Start difference. First operand 1697 states and 1858 transitions. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:13,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:13,101 INFO L93 Difference]: Finished difference Result 2866 states and 3158 transitions. [2022-11-20 11:15:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:15:13,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 471 [2022-11-20 11:15:13,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:13,105 INFO L225 Difference]: With dead ends: 2866 [2022-11-20 11:15:13,105 INFO L226 Difference]: Without dead ends: 2147 [2022-11-20 11:15:13,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:15:13,107 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 449 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:13,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 937 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:13,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2022-11-20 11:15:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1648. [2022-11-20 11:15:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1645 states have (on average 1.0693009118541033) internal successors, (1759), 1646 states have internal predecessors, (1759), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 1761 transitions. [2022-11-20 11:15:13,538 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 1761 transitions. Word has length 471 [2022-11-20 11:15:13,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:13,539 INFO L495 AbstractCegarLoop]: Abstraction has 1648 states and 1761 transitions. [2022-11-20 11:15:13,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 1761 transitions. [2022-11-20 11:15:13,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-11-20 11:15:13,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:13,545 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:13,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 11:15:13,546 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:13,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:13,547 INFO L85 PathProgramCache]: Analyzing trace with hash 281790686, now seen corresponding path program 1 times [2022-11-20 11:15:13,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:13,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947569553] [2022-11-20 11:15:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:13,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 94 proven. 316 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2022-11-20 11:15:16,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:16,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947569553] [2022-11-20 11:15:16,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947569553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:16,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665666497] [2022-11-20 11:15:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:16,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:16,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:16,199 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:16,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:15:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:16,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 11:15:16,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 96 proven. 263 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2022-11-20 11:15:17,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 25 proven. 334 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2022-11-20 11:15:19,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665666497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:19,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:19,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2022-11-20 11:15:19,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695893908] [2022-11-20 11:15:19,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:19,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 11:15:19,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:19,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 11:15:19,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:15:19,333 INFO L87 Difference]: Start difference. First operand 1648 states and 1761 transitions. Second operand has 30 states, 30 states have (on average 13.9) internal successors, (417), 30 states have internal predecessors, (417), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:21,140 INFO L93 Difference]: Finished difference Result 1970 states and 2107 transitions. [2022-11-20 11:15:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 11:15:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.9) internal successors, (417), 30 states have internal predecessors, (417), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 528 [2022-11-20 11:15:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:21,143 INFO L225 Difference]: With dead ends: 1970 [2022-11-20 11:15:21,143 INFO L226 Difference]: Without dead ends: 1967 [2022-11-20 11:15:21,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1105 GetRequests, 1049 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:15:21,145 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 2557 mSDsluCounter, 7483 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2557 SdHoareTripleChecker+Valid, 7880 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:21,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2557 Valid, 7880 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:15:21,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2022-11-20 11:15:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1648. [2022-11-20 11:15:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1645 states have (on average 1.068693009118541) internal successors, (1758), 1646 states have internal predecessors, (1758), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 1760 transitions. [2022-11-20 11:15:21,598 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 1760 transitions. Word has length 528 [2022-11-20 11:15:21,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:21,599 INFO L495 AbstractCegarLoop]: Abstraction has 1648 states and 1760 transitions. [2022-11-20 11:15:21,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.9) internal successors, (417), 30 states have internal predecessors, (417), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 1760 transitions. [2022-11-20 11:15:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2022-11-20 11:15:21,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:21,603 INFO L195 NwaCegarLoop]: trace histogram [11, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:21,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:21,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 11:15:21,805 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:21,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1226769046, now seen corresponding path program 1 times [2022-11-20 11:15:21,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:21,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986414404] [2022-11-20 11:15:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:21,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 281 proven. 48 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-11-20 11:15:22,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:22,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986414404] [2022-11-20 11:15:22,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986414404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:22,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343746046] [2022-11-20 11:15:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:22,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:22,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:22,664 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:22,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:15:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:23,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:15:23,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 281 proven. 48 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-11-20 11:15:23,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 281 proven. 48 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-11-20 11:15:23,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343746046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:23,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:23,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-11-20 11:15:23,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844113037] [2022-11-20 11:15:23,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:23,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:15:23,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:23,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:15:23,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:15:23,805 INFO L87 Difference]: Start difference. First operand 1648 states and 1760 transitions. Second operand has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:25,243 INFO L93 Difference]: Finished difference Result 2665 states and 2851 transitions. [2022-11-20 11:15:25,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:15:25,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 577 [2022-11-20 11:15:25,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:25,248 INFO L225 Difference]: With dead ends: 2665 [2022-11-20 11:15:25,248 INFO L226 Difference]: Without dead ends: 2177 [2022-11-20 11:15:25,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1180 GetRequests, 1157 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:15:25,251 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1156 mSDsluCounter, 2905 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:25,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 3423 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2022-11-20 11:15:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1644. [2022-11-20 11:15:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1641 states have (on average 1.0639853747714807) internal successors, (1746), 1642 states have internal predecessors, (1746), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:25,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 1748 transitions. [2022-11-20 11:15:25,859 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 1748 transitions. Word has length 577 [2022-11-20 11:15:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:25,860 INFO L495 AbstractCegarLoop]: Abstraction has 1644 states and 1748 transitions. [2022-11-20 11:15:25,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 1748 transitions. [2022-11-20 11:15:25,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2022-11-20 11:15:25,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:25,868 INFO L195 NwaCegarLoop]: trace histogram [12, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:25,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:26,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:26,078 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash 381551868, now seen corresponding path program 1 times [2022-11-20 11:15:26,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:26,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822700516] [2022-11-20 11:15:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:26,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 179 proven. 793 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-11-20 11:15:28,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:28,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822700516] [2022-11-20 11:15:28,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822700516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:28,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756637988] [2022-11-20 11:15:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:28,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:28,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:28,735 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:28,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:15:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:29,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 11:15:29,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 243 proven. 693 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-11-20 11:15:31,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 30 proven. 906 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-11-20 11:15:32,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756637988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:32,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:32,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 34 [2022-11-20 11:15:32,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671788969] [2022-11-20 11:15:32,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:32,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:15:32,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:32,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:15:32,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:15:32,575 INFO L87 Difference]: Start difference. First operand 1644 states and 1748 transitions. Second operand has 34 states, 34 states have (on average 20.794117647058822) internal successors, (707), 34 states have internal predecessors, (707), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:34,756 INFO L93 Difference]: Finished difference Result 1897 states and 2018 transitions. [2022-11-20 11:15:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 11:15:34,757 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 20.794117647058822) internal successors, (707), 34 states have internal predecessors, (707), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 636 [2022-11-20 11:15:34,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:34,760 INFO L225 Difference]: With dead ends: 1897 [2022-11-20 11:15:34,760 INFO L226 Difference]: Without dead ends: 1894 [2022-11-20 11:15:34,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1335 GetRequests, 1269 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=447, Invalid=3585, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 11:15:34,763 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 3197 mSDsluCounter, 12561 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3197 SdHoareTripleChecker+Valid, 13197 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:34,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3197 Valid, 13197 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:15:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2022-11-20 11:15:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1644. [2022-11-20 11:15:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1641 states have (on average 1.0633759902498476) internal successors, (1745), 1642 states have internal predecessors, (1745), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 1747 transitions. [2022-11-20 11:15:35,275 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 1747 transitions. Word has length 636 [2022-11-20 11:15:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:35,276 INFO L495 AbstractCegarLoop]: Abstraction has 1644 states and 1747 transitions. [2022-11-20 11:15:35,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 20.794117647058822) internal successors, (707), 34 states have internal predecessors, (707), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 1747 transitions. [2022-11-20 11:15:35,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2022-11-20 11:15:35,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:35,282 INFO L195 NwaCegarLoop]: trace histogram [13, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:35,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:35,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 11:15:35,483 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:35,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:35,484 INFO L85 PathProgramCache]: Analyzing trace with hash 37600824, now seen corresponding path program 1 times [2022-11-20 11:15:35,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:35,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179357336] [2022-11-20 11:15:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:35,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 474 proven. 212 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2022-11-20 11:15:36,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:36,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179357336] [2022-11-20 11:15:36,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179357336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:36,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183136955] [2022-11-20 11:15:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:36,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:36,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:36,630 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:36,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:15:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:37,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1871 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:15:37,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 474 proven. 212 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2022-11-20 11:15:37,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 474 proven. 212 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2022-11-20 11:15:38,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183136955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:38,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:38,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-11-20 11:15:38,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508293040] [2022-11-20 11:15:38,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:38,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:15:38,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:15:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:15:38,741 INFO L87 Difference]: Start difference. First operand 1644 states and 1747 transitions. Second operand has 11 states, 11 states have (on average 35.18181818181818) internal successors, (387), 11 states have internal predecessors, (387), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:40,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:40,026 INFO L93 Difference]: Finished difference Result 2299 states and 2450 transitions. [2022-11-20 11:15:40,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:15:40,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 35.18181818181818) internal successors, (387), 11 states have internal predecessors, (387), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 685 [2022-11-20 11:15:40,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:40,030 INFO L225 Difference]: With dead ends: 2299 [2022-11-20 11:15:40,031 INFO L226 Difference]: Without dead ends: 2003 [2022-11-20 11:15:40,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1403 GetRequests, 1376 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:15:40,033 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1410 mSDsluCounter, 5083 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 5785 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:40,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1410 Valid, 5785 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:15:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-11-20 11:15:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1642. [2022-11-20 11:15:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1639 states have (on average 1.0585723001830385) internal successors, (1735), 1640 states have internal predecessors, (1735), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 1737 transitions. [2022-11-20 11:15:40,705 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 1737 transitions. Word has length 685 [2022-11-20 11:15:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:40,705 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 1737 transitions. [2022-11-20 11:15:40,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.18181818181818) internal successors, (387), 11 states have internal predecessors, (387), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 1737 transitions. [2022-11-20 11:15:40,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2022-11-20 11:15:40,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:40,712 INFO L195 NwaCegarLoop]: trace histogram [14, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:40,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:40,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:40,922 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:40,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:40,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1036327175, now seen corresponding path program 1 times [2022-11-20 11:15:40,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:40,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655731561] [2022-11-20 11:15:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:40,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 136 proven. 1408 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-20 11:15:43,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:43,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655731561] [2022-11-20 11:15:43,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655731561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:43,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539303983] [2022-11-20 11:15:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:43,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:43,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:43,896 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:43,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:15:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:44,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 2013 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-20 11:15:44,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 298 proven. 1228 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-20 11:15:46,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 35 proven. 1491 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-20 11:15:48,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539303983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:48,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:48,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 40 [2022-11-20 11:15:48,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966524335] [2022-11-20 11:15:48,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:48,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 11:15:48,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:48,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 11:15:48,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:15:48,686 INFO L87 Difference]: Start difference. First operand 1642 states and 1737 transitions. Second operand has 40 states, 40 states have (on average 25.5) internal successors, (1020), 40 states have internal predecessors, (1020), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:51,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:51,655 INFO L93 Difference]: Finished difference Result 1905 states and 2017 transitions. [2022-11-20 11:15:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:15:51,656 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 25.5) internal successors, (1020), 40 states have internal predecessors, (1020), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 745 [2022-11-20 11:15:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:51,660 INFO L225 Difference]: With dead ends: 1905 [2022-11-20 11:15:51,660 INFO L226 Difference]: Without dead ends: 1902 [2022-11-20 11:15:51,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1566 GetRequests, 1489 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=510, Invalid=5040, Unknown=0, NotChecked=0, Total=5550 [2022-11-20 11:15:51,663 INFO L413 NwaCegarLoop]: 880 mSDtfsCounter, 3010 mSDsluCounter, 24736 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3010 SdHoareTripleChecker+Valid, 25616 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:51,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3010 Valid, 25616 Invalid, 1818 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17 Valid, 1801 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 11:15:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2022-11-20 11:15:52,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1642. [2022-11-20 11:15:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1639 states have (on average 1.0579621720561319) internal successors, (1734), 1640 states have internal predecessors, (1734), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 1736 transitions. [2022-11-20 11:15:52,204 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 1736 transitions. Word has length 745 [2022-11-20 11:15:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:52,204 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 1736 transitions. [2022-11-20 11:15:52,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 25.5) internal successors, (1020), 40 states have internal predecessors, (1020), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 1736 transitions. [2022-11-20 11:15:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2022-11-20 11:15:52,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:52,211 INFO L195 NwaCegarLoop]: trace histogram [15, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:52,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:52,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:52,414 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:52,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:52,415 INFO L85 PathProgramCache]: Analyzing trace with hash 502016475, now seen corresponding path program 1 times [2022-11-20 11:15:52,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:52,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737582481] [2022-11-20 11:15:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:52,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 667 proven. 493 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-20 11:15:53,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:53,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737582481] [2022-11-20 11:15:53,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737582481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153399167] [2022-11-20 11:15:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:53,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:53,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:53,881 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:53,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:15:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:54,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 2141 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:15:54,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 667 proven. 493 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-20 11:15:55,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 667 proven. 493 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-20 11:15:56,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153399167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:56,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:56,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-11-20 11:15:56,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359945066] [2022-11-20 11:15:56,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:56,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:15:56,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:56,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:15:56,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:15:56,520 INFO L87 Difference]: Start difference. First operand 1642 states and 1736 transitions. Second operand has 13 states, 13 states have (on average 38.0) internal successors, (494), 13 states have internal predecessors, (494), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:57,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:57,950 INFO L93 Difference]: Finished difference Result 2012 states and 2135 transitions. [2022-11-20 11:15:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:15:57,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 38.0) internal successors, (494), 13 states have internal predecessors, (494), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 794 [2022-11-20 11:15:57,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:57,955 INFO L225 Difference]: With dead ends: 2012 [2022-11-20 11:15:57,955 INFO L226 Difference]: Without dead ends: 1908 [2022-11-20 11:15:57,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1626 GetRequests, 1598 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:15:57,958 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 1502 mSDsluCounter, 7529 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 8368 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:57,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1502 Valid, 8368 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:15:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2022-11-20 11:15:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1641. [2022-11-20 11:15:58,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1639 states have (on average 1.0530811470408785) internal successors, (1726), 1639 states have internal predecessors, (1726), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 1727 transitions. [2022-11-20 11:15:58,508 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 1727 transitions. Word has length 794 [2022-11-20 11:15:58,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:58,509 INFO L495 AbstractCegarLoop]: Abstraction has 1641 states and 1727 transitions. [2022-11-20 11:15:58,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.0) internal successors, (494), 13 states have internal predecessors, (494), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 1727 transitions. [2022-11-20 11:15:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2022-11-20 11:15:58,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:58,517 INFO L195 NwaCegarLoop]: trace histogram [16, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:58,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:58,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-20 11:15:58,718 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:58,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:58,718 INFO L85 PathProgramCache]: Analyzing trace with hash 720245394, now seen corresponding path program 1 times [2022-11-20 11:15:58,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:58,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829304842] [2022-11-20 11:15:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:58,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 93 proven. 2031 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 11:16:02,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:02,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829304842] [2022-11-20 11:16:02,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829304842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:02,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994141242] [2022-11-20 11:16:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:02,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:02,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:02,208 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:02,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:16:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:02,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 2284 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-20 11:16:02,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 257 proven. 1867 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 11:16:05,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 40 proven. 2084 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 11:16:07,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994141242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:07,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:07,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 46 [2022-11-20 11:16:07,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824813857] [2022-11-20 11:16:07,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:07,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 11:16:07,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:07,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 11:16:07,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 11:16:07,939 INFO L87 Difference]: Start difference. First operand 1641 states and 1727 transitions. Second operand has 46 states, 46 states have (on average 28.065217391304348) internal successors, (1291), 46 states have internal predecessors, (1291), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:11,646 INFO L93 Difference]: Finished difference Result 1908 states and 2012 transitions. [2022-11-20 11:16:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 11:16:11,647 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 28.065217391304348) internal successors, (1291), 46 states have internal predecessors, (1291), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 855 [2022-11-20 11:16:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:11,648 INFO L225 Difference]: With dead ends: 1908 [2022-11-20 11:16:11,648 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 11:16:11,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1811 GetRequests, 1716 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2001 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=693, Invalid=7863, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 11:16:11,652 INFO L413 NwaCegarLoop]: 1051 mSDtfsCounter, 4554 mSDsluCounter, 31301 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4554 SdHoareTripleChecker+Valid, 32352 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:11,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4554 Valid, 32352 Invalid, 2222 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [21 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 11:16:11,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 11:16:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 11:16:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 11:16:11,653 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 855 [2022-11-20 11:16:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:11,654 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 11:16:11,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 28.065217391304348) internal successors, (1291), 46 states have internal predecessors, (1291), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 11:16:11,654 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 11:16:11,657 INFO L805 garLoopResultBuilder]: Registering result SAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 11:16:11,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:11,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6499effa-0f1d-4254-851a-b0b021375123/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:11,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-20 11:16:33,650 WARN L233 SmtUtils]: Spent 13.21s on a formula simplification. DAG size of input: 156 DAG size of output: 150 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-20 11:16:58,927 WARN L233 SmtUtils]: Spent 25.27s on a formula simplification. DAG size of input: 232 DAG size of output: 225 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-20 11:17:36,963 WARN L233 SmtUtils]: Spent 38.03s on a formula simplification. DAG size of input: 241 DAG size of output: 237 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)