./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label15.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label15.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a --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 3d925fbc5b311aa71bdfc08132a671e52df1445341b50997ca2cb386a552fde0 --- 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-b5237d8 [2022-11-21 13:55:46,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:55:46,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:55:46,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:55:46,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:55:46,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:55:46,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:55:46,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:55:46,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:55:46,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:55:46,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:55:46,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:55:46,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:55:46,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:55:46,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:55:46,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:55:46,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:55:46,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:55:46,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:55:46,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:55:46,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:55:46,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:55:46,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:55:46,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:55:46,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:55:46,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:55:46,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:55:46,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:55:46,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:55:46,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:55:46,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:55:46,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:55:46,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:55:46,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:55:46,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:55:46,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:55:46,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:55:46,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:55:46,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:55:46,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:55:46,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:55:46,785 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 13:55:46,810 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:55:46,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:55:46,811 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:55:46,811 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:55:46,812 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:55:46,812 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:55:46,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:55:46,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:55:46,813 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:55:46,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:55:46,814 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:55:46,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:55:46,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:55:46,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:55:46,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:55:46,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:55:46,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:55:46,816 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:55:46,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:55:46,816 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:55:46,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:55:46,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:55:46,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:55:46,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:55:46,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:55:46,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:55:46,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:55:46,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:55:46,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:55:46,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:55:46,819 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:55:46,819 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:55:46,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:55:46,819 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_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d925fbc5b311aa71bdfc08132a671e52df1445341b50997ca2cb386a552fde0 [2022-11-21 13:55:47,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:55:47,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:55:47,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:55:47,106 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:55:47,106 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:55:47,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/eca-rers2012/Problem18_label15.c [2022-11-21 13:55:50,248 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:55:50,730 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:55:50,730 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/sv-benchmarks/c/eca-rers2012/Problem18_label15.c [2022-11-21 13:55:50,755 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/data/abb097f93/06c0bd3f711349a78258d75ba86f98c9/FLAG9354887d7 [2022-11-21 13:55:50,776 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/data/abb097f93/06c0bd3f711349a78258d75ba86f98c9 [2022-11-21 13:55:50,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:55:50,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:55:50,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:55:50,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:55:50,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:55:50,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:55:50" (1/1) ... [2022-11-21 13:55:50,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d25e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:50, skipping insertion in model container [2022-11-21 13:55:50,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:55:50" (1/1) ... [2022-11-21 13:55:50,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:55:50,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:55:51,113 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_865c794d-ca51-44bc-bccc-82c614ef6615/sv-benchmarks/c/eca-rers2012/Problem18_label15.c[3868,3881] [2022-11-21 13:55:51,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:55:52,003 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:55:52,033 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_865c794d-ca51-44bc-bccc-82c614ef6615/sv-benchmarks/c/eca-rers2012/Problem18_label15.c[3868,3881] [2022-11-21 13:55:52,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:55:52,518 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:55:52,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52 WrapperNode [2022-11-21 13:55:52,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:55:52,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:55:52,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:55:52,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:55:52,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52" (1/1) ... [2022-11-21 13:55:52,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52" (1/1) ... [2022-11-21 13:55:52,767 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2022-11-21 13:55:52,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:55:52,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:55:52,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:55:52,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:55:52,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52" (1/1) ... [2022-11-21 13:55:52,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52" (1/1) ... [2022-11-21 13:55:52,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52" (1/1) ... [2022-11-21 13:55:52,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52" (1/1) ... [2022-11-21 13:55:52,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52" (1/1) ... [2022-11-21 13:55:53,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52" (1/1) ... [2022-11-21 13:55:53,052 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52" (1/1) ... [2022-11-21 13:55:53,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52" (1/1) ... [2022-11-21 13:55:53,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:55:53,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:55:53,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:55:53,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:55:53,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52" (1/1) ... [2022-11-21 13:55:53,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:55:53,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:55:53,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:55:53,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:55:53,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:55:53,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:55:53,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:55:53,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:55:53,345 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:55:53,347 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:55:57,424 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:55:57,455 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:55:57,456 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 13:55:57,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:55:57 BoogieIcfgContainer [2022-11-21 13:55:57,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:55:57,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:55:57,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:55:57,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:55:57,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:55:50" (1/3) ... [2022-11-21 13:55:57,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37006daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:55:57, skipping insertion in model container [2022-11-21 13:55:57,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:52" (2/3) ... [2022-11-21 13:55:57,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37006daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:55:57, skipping insertion in model container [2022-11-21 13:55:57,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:55:57" (3/3) ... [2022-11-21 13:55:57,480 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label15.c [2022-11-21 13:55:57,500 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:55:57,500 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 13:55:57,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:55:57,595 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;@43e16267, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:55:57,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 13:55:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:57,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 13:55:57,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:57,615 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] [2022-11-21 13:55:57,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:55:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:57,620 INFO L85 PathProgramCache]: Analyzing trace with hash -596708735, now seen corresponding path program 1 times [2022-11-21 13:55:57,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:55:57,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274698373] [2022-11-21 13:55:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:57,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:55:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:55:57,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:55:57,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274698373] [2022-11-21 13:55:57,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274698373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:55:57,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:55:57,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:55:57,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403225493] [2022-11-21 13:55:57,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:55:57,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:55:57,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:55:58,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:55:58,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:55:58,024 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:02,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:02,443 INFO L93 Difference]: Finished difference Result 2221 states and 4282 transitions. [2022-11-21 13:56:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:56:02,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-21 13:56:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:02,478 INFO L225 Difference]: With dead ends: 2221 [2022-11-21 13:56:02,482 INFO L226 Difference]: Without dead ends: 1384 [2022-11-21 13:56:02,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:02,497 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 760 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 2786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:02,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 487 Invalid, 2786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-21 13:56:02,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-11-21 13:56:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2022-11-21 13:56:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.5994215473608098) internal successors, (2212), 1383 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2212 transitions. [2022-11-21 13:56:02,665 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2212 transitions. Word has length 35 [2022-11-21 13:56:02,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:02,665 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 2212 transitions. [2022-11-21 13:56:02,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2212 transitions. [2022-11-21 13:56:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-21 13:56:02,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:02,669 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 13:56:02,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:56:02,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:02,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:02,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1291083566, now seen corresponding path program 1 times [2022-11-21 13:56:02,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:02,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160969668] [2022-11-21 13:56:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:02,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:56:02,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:02,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160969668] [2022-11-21 13:56:02,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160969668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:02,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:02,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:56:02,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428108280] [2022-11-21 13:56:02,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:02,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:56:02,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:56:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:02,950 INFO L87 Difference]: Start difference. First operand 1384 states and 2212 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:06,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:06,790 INFO L93 Difference]: Finished difference Result 4146 states and 6631 transitions. [2022-11-21 13:56:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:56:06,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-11-21 13:56:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:06,801 INFO L225 Difference]: With dead ends: 4146 [2022-11-21 13:56:06,802 INFO L226 Difference]: Without dead ends: 2764 [2022-11-21 13:56:06,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:06,805 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 714 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:06,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 529 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-21 13:56:06,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2022-11-21 13:56:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2022-11-21 13:56:06,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 1.3503438291711907) internal successors, (3731), 2763 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 3731 transitions. [2022-11-21 13:56:06,864 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 3731 transitions. Word has length 100 [2022-11-21 13:56:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:06,865 INFO L495 AbstractCegarLoop]: Abstraction has 2764 states and 3731 transitions. [2022-11-21 13:56:06,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 3731 transitions. [2022-11-21 13:56:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-21 13:56:06,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:06,871 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:06,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 13:56:06,871 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:06,872 INFO L85 PathProgramCache]: Analyzing trace with hash 718264794, now seen corresponding path program 1 times [2022-11-21 13:56:06,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:06,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872089249] [2022-11-21 13:56:06,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:06,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-21 13:56:07,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:07,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872089249] [2022-11-21 13:56:07,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872089249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:07,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:07,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:07,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687566503] [2022-11-21 13:56:07,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:07,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:56:07,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:07,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:56:07,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:56:07,751 INFO L87 Difference]: Start difference. First operand 2764 states and 3731 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:12,974 INFO L93 Difference]: Finished difference Result 7596 states and 9794 transitions. [2022-11-21 13:56:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:56:12,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-11-21 13:56:12,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:12,991 INFO L225 Difference]: With dead ends: 7596 [2022-11-21 13:56:12,991 INFO L226 Difference]: Without dead ends: 4834 [2022-11-21 13:56:12,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:56:12,996 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 1873 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4348 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 4465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 4348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:12,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1873 Valid, 641 Invalid, 4465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 4348 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-21 13:56:13,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2022-11-21 13:56:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 4144. [2022-11-21 13:56:13,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 1.2698527636978034) internal successors, (5261), 4143 states have internal predecessors, (5261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5261 transitions. [2022-11-21 13:56:13,073 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5261 transitions. Word has length 218 [2022-11-21 13:56:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:13,074 INFO L495 AbstractCegarLoop]: Abstraction has 4144 states and 5261 transitions. [2022-11-21 13:56:13,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5261 transitions. [2022-11-21 13:56:13,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-11-21 13:56:13,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:13,081 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:13,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 13:56:13,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:13,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1219159324, now seen corresponding path program 1 times [2022-11-21 13:56:13,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:13,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515775906] [2022-11-21 13:56:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:13,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:56:13,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515775906] [2022-11-21 13:56:13,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515775906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:13,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:13,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:13,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570144355] [2022-11-21 13:56:13,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:13,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:56:13,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:13,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:56:13,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:13,464 INFO L87 Difference]: Start difference. First operand 4144 states and 5261 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:16,965 INFO L93 Difference]: Finished difference Result 12426 states and 15778 transitions. [2022-11-21 13:56:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:56:16,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 334 [2022-11-21 13:56:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:16,993 INFO L225 Difference]: With dead ends: 12426 [2022-11-21 13:56:16,993 INFO L226 Difference]: Without dead ends: 8284 [2022-11-21 13:56:16,999 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 [2022-11-21 13:56:17,000 INFO L413 NwaCegarLoop]: 817 mSDtfsCounter, 671 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 2791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:17,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 824 Invalid, 2791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-21 13:56:17,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2022-11-21 13:56:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 8284. [2022-11-21 13:56:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8283 states have (on average 1.2472534106000241) internal successors, (10331), 8283 states have internal predecessors, (10331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 10331 transitions. [2022-11-21 13:56:17,209 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 10331 transitions. Word has length 334 [2022-11-21 13:56:17,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:17,213 INFO L495 AbstractCegarLoop]: Abstraction has 8284 states and 10331 transitions. [2022-11-21 13:56:17,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 10331 transitions. [2022-11-21 13:56:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-11-21 13:56:17,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:17,223 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:17,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 13:56:17,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:17,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:17,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1097103501, now seen corresponding path program 1 times [2022-11-21 13:56:17,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:17,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003302771] [2022-11-21 13:56:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:17,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 13:56:17,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:17,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003302771] [2022-11-21 13:56:17,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003302771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:56:17,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591787754] [2022-11-21 13:56:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:17,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:17,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:17,799 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:17,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:56:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:18,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 13:56:18,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-21 13:56:18,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:56:18,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591787754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:18,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:56:18,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-21 13:56:18,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786470373] [2022-11-21 13:56:18,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:18,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:56:18,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:18,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:56:18,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:56:18,725 INFO L87 Difference]: Start difference. First operand 8284 states and 10331 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 2 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:22,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:22,264 INFO L93 Difference]: Finished difference Result 24156 states and 30160 transitions. [2022-11-21 13:56:22,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:56:22,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 2 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 341 [2022-11-21 13:56:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:22,396 INFO L225 Difference]: With dead ends: 24156 [2022-11-21 13:56:22,399 INFO L226 Difference]: Without dead ends: 15874 [2022-11-21 13:56:22,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:56:22,408 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 391 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:22,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 550 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-21 13:56:22,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15874 states. [2022-11-21 13:56:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15874 to 12424. [2022-11-21 13:56:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 1.231023102310231) internal successors, (15293), 12423 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 15293 transitions. [2022-11-21 13:56:22,723 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 15293 transitions. Word has length 341 [2022-11-21 13:56:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:22,724 INFO L495 AbstractCegarLoop]: Abstraction has 12424 states and 15293 transitions. [2022-11-21 13:56:22,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 2 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 15293 transitions. [2022-11-21 13:56:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-11-21 13:56:22,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:22,736 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:22,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:22,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:22,943 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:22,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1318151069, now seen corresponding path program 1 times [2022-11-21 13:56:22,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:22,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045227184] [2022-11-21 13:56:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:22,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:56:23,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045227184] [2022-11-21 13:56:23,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045227184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:23,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:23,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:23,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020615187] [2022-11-21 13:56:23,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:23,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:56:23,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:56:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:23,683 INFO L87 Difference]: Start difference. First operand 12424 states and 15293 transitions. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:26,968 INFO L93 Difference]: Finished difference Result 31056 states and 38078 transitions. [2022-11-21 13:56:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:56:26,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 427 [2022-11-21 13:56:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:27,010 INFO L225 Difference]: With dead ends: 31056 [2022-11-21 13:56:27,011 INFO L226 Difference]: Without dead ends: 18634 [2022-11-21 13:56:27,023 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 [2022-11-21 13:56:27,024 INFO L413 NwaCegarLoop]: 1070 mSDtfsCounter, 600 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:27,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 1077 Invalid, 2555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-21 13:56:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18634 states. [2022-11-21 13:56:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18634 to 17944. [2022-11-21 13:56:27,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17944 states, 17943 states have (on average 1.1940589644986903) internal successors, (21425), 17943 states have internal predecessors, (21425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17944 states to 17944 states and 21425 transitions. [2022-11-21 13:56:27,383 INFO L78 Accepts]: Start accepts. Automaton has 17944 states and 21425 transitions. Word has length 427 [2022-11-21 13:56:27,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:27,384 INFO L495 AbstractCegarLoop]: Abstraction has 17944 states and 21425 transitions. [2022-11-21 13:56:27,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:27,384 INFO L276 IsEmpty]: Start isEmpty. Operand 17944 states and 21425 transitions. [2022-11-21 13:56:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-11-21 13:56:27,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:27,394 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:27,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 13:56:27,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:27,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash 819741858, now seen corresponding path program 1 times [2022-11-21 13:56:27,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:27,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681280660] [2022-11-21 13:56:27,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:27,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-21 13:56:27,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:27,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681280660] [2022-11-21 13:56:27,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681280660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:27,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:27,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:56:27,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830449345] [2022-11-21 13:56:27,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:56:27,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:27,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:56:27,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:27,767 INFO L87 Difference]: Start difference. First operand 17944 states and 21425 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 2 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:30,958 INFO L93 Difference]: Finished difference Result 42786 states and 50792 transitions. [2022-11-21 13:56:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:56:30,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 2 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 432 [2022-11-21 13:56:30,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:31,016 INFO L225 Difference]: With dead ends: 42786 [2022-11-21 13:56:31,016 INFO L226 Difference]: Without dead ends: 24844 [2022-11-21 13:56:31,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:31,035 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 499 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 2680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:31,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 109 Invalid, 2680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-21 13:56:31,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24844 states. [2022-11-21 13:56:31,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24844 to 24844. [2022-11-21 13:56:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24844 states, 24843 states have (on average 1.1503039085456668) internal successors, (28577), 24843 states have internal predecessors, (28577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24844 states to 24844 states and 28577 transitions. [2022-11-21 13:56:31,584 INFO L78 Accepts]: Start accepts. Automaton has 24844 states and 28577 transitions. Word has length 432 [2022-11-21 13:56:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:31,585 INFO L495 AbstractCegarLoop]: Abstraction has 24844 states and 28577 transitions. [2022-11-21 13:56:31,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 2 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 24844 states and 28577 transitions. [2022-11-21 13:56:31,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-11-21 13:56:31,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:31,597 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:31,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 13:56:31,597 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:31,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:31,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1242334772, now seen corresponding path program 1 times [2022-11-21 13:56:31,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:31,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75821704] [2022-11-21 13:56:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:31,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-21 13:56:31,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:31,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75821704] [2022-11-21 13:56:31,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75821704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:31,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:31,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:31,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656368008] [2022-11-21 13:56:31,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:31,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:56:31,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:31,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:56:31,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:31,943 INFO L87 Difference]: Start difference. First operand 24844 states and 28577 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:35,719 INFO L93 Difference]: Finished difference Result 53826 states and 62398 transitions. [2022-11-21 13:56:35,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:56:35,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 434 [2022-11-21 13:56:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:35,774 INFO L225 Difference]: With dead ends: 53826 [2022-11-21 13:56:35,775 INFO L226 Difference]: Without dead ends: 28984 [2022-11-21 13:56:35,798 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 [2022-11-21 13:56:35,799 INFO L413 NwaCegarLoop]: 1292 mSDtfsCounter, 669 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 2713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:35,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 1299 Invalid, 2713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-21 13:56:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28984 states. [2022-11-21 13:56:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28984 to 27604. [2022-11-21 13:56:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27604 states, 27603 states have (on average 1.143317755316451) internal successors, (31559), 27603 states have internal predecessors, (31559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27604 states to 27604 states and 31559 transitions. [2022-11-21 13:56:36,441 INFO L78 Accepts]: Start accepts. Automaton has 27604 states and 31559 transitions. Word has length 434 [2022-11-21 13:56:36,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:36,442 INFO L495 AbstractCegarLoop]: Abstraction has 27604 states and 31559 transitions. [2022-11-21 13:56:36,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 27604 states and 31559 transitions. [2022-11-21 13:56:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2022-11-21 13:56:36,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:36,460 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:36,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 13:56:36,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:36,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash -657065959, now seen corresponding path program 1 times [2022-11-21 13:56:36,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:36,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255496635] [2022-11-21 13:56:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:36,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-21 13:56:37,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255496635] [2022-11-21 13:56:37,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255496635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:37,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:37,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:37,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417720389] [2022-11-21 13:56:37,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:37,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:56:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:56:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:37,674 INFO L87 Difference]: Start difference. First operand 27604 states and 31559 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:40,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:40,727 INFO L93 Difference]: Finished difference Result 55206 states and 63116 transitions. [2022-11-21 13:56:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:56:40,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 524 [2022-11-21 13:56:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:40,780 INFO L225 Difference]: With dead ends: 55206 [2022-11-21 13:56:40,780 INFO L226 Difference]: Without dead ends: 27604 [2022-11-21 13:56:40,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:40,797 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 762 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:40,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 814 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-21 13:56:40,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27604 states. [2022-11-21 13:56:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27604 to 27604. [2022-11-21 13:56:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27604 states, 27603 states have (on average 1.1213273919501503) internal successors, (30952), 27603 states have internal predecessors, (30952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27604 states to 27604 states and 30952 transitions. [2022-11-21 13:56:41,403 INFO L78 Accepts]: Start accepts. Automaton has 27604 states and 30952 transitions. Word has length 524 [2022-11-21 13:56:41,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:41,404 INFO L495 AbstractCegarLoop]: Abstraction has 27604 states and 30952 transitions. [2022-11-21 13:56:41,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:41,405 INFO L276 IsEmpty]: Start isEmpty. Operand 27604 states and 30952 transitions. [2022-11-21 13:56:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2022-11-21 13:56:41,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:41,453 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:41,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 13:56:41,453 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:41,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:41,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2059949351, now seen corresponding path program 1 times [2022-11-21 13:56:41,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:41,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21485210] [2022-11-21 13:56:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-21 13:56:42,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:42,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21485210] [2022-11-21 13:56:42,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21485210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:42,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:42,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:42,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410487282] [2022-11-21 13:56:42,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:42,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:56:42,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:42,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:56:42,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:56:42,642 INFO L87 Difference]: Start difference. First operand 27604 states and 30952 transitions. Second operand has 4 states, 4 states have (on average 166.5) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:45,811 INFO L93 Difference]: Finished difference Result 57329 states and 64061 transitions. [2022-11-21 13:56:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:56:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 166.5) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 764 [2022-11-21 13:56:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:45,852 INFO L225 Difference]: With dead ends: 57329 [2022-11-21 13:56:45,852 INFO L226 Difference]: Without dead ends: 29674 [2022-11-21 13:56:45,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:56:45,868 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 531 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2590 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 2971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 2590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:45,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 637 Invalid, 2971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 2590 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-21 13:56:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29674 states. [2022-11-21 13:56:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29674 to 29674. [2022-11-21 13:56:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29674 states, 29673 states have (on average 1.0872510362956223) internal successors, (32262), 29673 states have internal predecessors, (32262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29674 states to 29674 states and 32262 transitions. [2022-11-21 13:56:46,396 INFO L78 Accepts]: Start accepts. Automaton has 29674 states and 32262 transitions. Word has length 764 [2022-11-21 13:56:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:46,396 INFO L495 AbstractCegarLoop]: Abstraction has 29674 states and 32262 transitions. [2022-11-21 13:56:46,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.5) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 29674 states and 32262 transitions. [2022-11-21 13:56:46,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2022-11-21 13:56:46,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:46,437 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:46,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 13:56:46,438 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:46,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1235919523, now seen corresponding path program 1 times [2022-11-21 13:56:46,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:46,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021911491] [2022-11-21 13:56:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:46,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 582 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-21 13:56:47,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:47,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021911491] [2022-11-21 13:56:47,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021911491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:47,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:47,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:47,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336623801] [2022-11-21 13:56:47,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:47,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:56:47,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:47,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:56:47,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:56:47,404 INFO L87 Difference]: Start difference. First operand 29674 states and 32262 transitions. Second operand has 3 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:50,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:50,126 INFO L93 Difference]: Finished difference Result 68316 states and 74903 transitions. [2022-11-21 13:56:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:56:50,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 871 [2022-11-21 13:56:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:50,170 INFO L225 Difference]: With dead ends: 68316 [2022-11-21 13:56:50,171 INFO L226 Difference]: Without dead ends: 35194 [2022-11-21 13:56:50,188 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 [2022-11-21 13:56:50,189 INFO L413 NwaCegarLoop]: 1090 mSDtfsCounter, 316 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:50,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 1097 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 1870 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-21 13:56:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35194 states. [2022-11-21 13:56:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35194 to 34504. [2022-11-21 13:56:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34504 states, 34503 states have (on average 1.0836738834304263) internal successors, (37390), 34503 states have internal predecessors, (37390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34504 states to 34504 states and 37390 transitions. [2022-11-21 13:56:50,691 INFO L78 Accepts]: Start accepts. Automaton has 34504 states and 37390 transitions. Word has length 871 [2022-11-21 13:56:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:50,691 INFO L495 AbstractCegarLoop]: Abstraction has 34504 states and 37390 transitions. [2022-11-21 13:56:50,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 34504 states and 37390 transitions. [2022-11-21 13:56:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 889 [2022-11-21 13:56:50,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:50,715 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 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, 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] [2022-11-21 13:56:50,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 13:56:50,716 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:50,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1710414131, now seen corresponding path program 1 times [2022-11-21 13:56:50,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:50,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472706684] [2022-11-21 13:56:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 605 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-21 13:56:52,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:52,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472706684] [2022-11-21 13:56:52,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472706684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:52,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:52,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:52,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42791046] [2022-11-21 13:56:52,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:52,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:56:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:56:52,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:56:52,454 INFO L87 Difference]: Start difference. First operand 34504 states and 37390 transitions. Second operand has 4 states, 4 states have (on average 214.0) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:56,366 INFO L93 Difference]: Finished difference Result 69006 states and 74803 transitions. [2022-11-21 13:56:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:56:56,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 214.0) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 888 [2022-11-21 13:56:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:56,398 INFO L225 Difference]: With dead ends: 69006 [2022-11-21 13:56:56,398 INFO L226 Difference]: Without dead ends: 35194 [2022-11-21 13:56:56,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:56:56,413 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 1423 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 3046 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 3767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 3046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:56,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1423 Valid, 97 Invalid, 3767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 3046 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-21 13:56:56,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35194 states. [2022-11-21 13:56:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35194 to 35194. [2022-11-21 13:56:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35194 states, 35193 states have (on average 1.0673713522575512) internal successors, (37564), 35193 states have internal predecessors, (37564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35194 states to 35194 states and 37564 transitions. [2022-11-21 13:56:57,064 INFO L78 Accepts]: Start accepts. Automaton has 35194 states and 37564 transitions. Word has length 888 [2022-11-21 13:56:57,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:57,065 INFO L495 AbstractCegarLoop]: Abstraction has 35194 states and 37564 transitions. [2022-11-21 13:56:57,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 214.0) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 35194 states and 37564 transitions. [2022-11-21 13:56:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1483 [2022-11-21 13:56:57,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:57,101 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2022-11-21 13:56:57,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 13:56:57,101 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:56:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:57,102 INFO L85 PathProgramCache]: Analyzing trace with hash 416770223, now seen corresponding path program 1 times [2022-11-21 13:56:57,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:57,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055328717] [2022-11-21 13:56:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:57,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1885 backedges. 563 proven. 1236 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-21 13:57:00,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:00,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055328717] [2022-11-21 13:57:00,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055328717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:00,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136549935] [2022-11-21 13:57:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:00,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:00,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:00,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:00,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:57:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:01,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 13:57:01,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1885 backedges. 1095 proven. 0 refuted. 0 times theorem prover too weak. 790 trivial. 0 not checked. [2022-11-21 13:57:01,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:57:01,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136549935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:01,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:57:01,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-21 13:57:01,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334793542] [2022-11-21 13:57:01,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:01,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:01,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:01,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:01,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:57:01,693 INFO L87 Difference]: Start difference. First operand 35194 states and 37564 transitions. Second operand has 3 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:04,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:04,394 INFO L93 Difference]: Finished difference Result 80046 states and 86041 transitions. [2022-11-21 13:57:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:04,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1482 [2022-11-21 13:57:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:04,439 INFO L225 Difference]: With dead ends: 80046 [2022-11-21 13:57:04,439 INFO L226 Difference]: Without dead ends: 45544 [2022-11-21 13:57:04,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1488 GetRequests, 1482 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:57:04,458 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 343 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:04,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 206 Invalid, 2276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 1832 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-21 13:57:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45544 states. [2022-11-21 13:57:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45544 to 44854. [2022-11-21 13:57:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44854 states, 44853 states have (on average 1.0645218825942524) internal successors, (47747), 44853 states have internal predecessors, (47747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44854 states to 44854 states and 47747 transitions. [2022-11-21 13:57:05,079 INFO L78 Accepts]: Start accepts. Automaton has 44854 states and 47747 transitions. Word has length 1482 [2022-11-21 13:57:05,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:05,080 INFO L495 AbstractCegarLoop]: Abstraction has 44854 states and 47747 transitions. [2022-11-21 13:57:05,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:05,080 INFO L276 IsEmpty]: Start isEmpty. Operand 44854 states and 47747 transitions. [2022-11-21 13:57:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1501 [2022-11-21 13:57:05,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:05,236 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 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, 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, 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, 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, 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, 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, 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] [2022-11-21 13:57:05,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:05,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:05,443 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:05,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:05,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1587587422, now seen corresponding path program 1 times [2022-11-21 13:57:05,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:05,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372537255] [2022-11-21 13:57:05,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:05,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 1889 trivial. 0 not checked. [2022-11-21 13:57:06,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:06,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372537255] [2022-11-21 13:57:06,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372537255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:06,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:06,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:57:06,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89069190] [2022-11-21 13:57:06,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:06,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:57:06,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:06,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:57:06,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:57:06,724 INFO L87 Difference]: Start difference. First operand 44854 states and 47747 transitions. Second operand has 4 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:11,013 INFO L93 Difference]: Finished difference Result 106967 states and 114481 transitions. [2022-11-21 13:57:11,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:57:11,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1500 [2022-11-21 13:57:11,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:11,087 INFO L225 Difference]: With dead ends: 106967 [2022-11-21 13:57:11,087 INFO L226 Difference]: Without dead ends: 62104 [2022-11-21 13:57:11,107 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 [2022-11-21 13:57:11,108 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 1457 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3691 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 4272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 3691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:11,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1457 Valid, 154 Invalid, 4272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 3691 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-21 13:57:11,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62104 states. [2022-11-21 13:57:11,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62104 to 60034. [2022-11-21 13:57:11,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60034 states, 60033 states have (on average 1.068379058184665) internal successors, (64138), 60033 states have internal predecessors, (64138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60034 states to 60034 states and 64138 transitions. [2022-11-21 13:57:11,841 INFO L78 Accepts]: Start accepts. Automaton has 60034 states and 64138 transitions. Word has length 1500 [2022-11-21 13:57:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:11,842 INFO L495 AbstractCegarLoop]: Abstraction has 60034 states and 64138 transitions. [2022-11-21 13:57:11,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 60034 states and 64138 transitions. [2022-11-21 13:57:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1813 [2022-11-21 13:57:11,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:11,933 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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, 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, 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] [2022-11-21 13:57:11,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 13:57:11,933 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:11,934 INFO L85 PathProgramCache]: Analyzing trace with hash 644693197, now seen corresponding path program 1 times [2022-11-21 13:57:11,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:11,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176957916] [2022-11-21 13:57:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:11,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3372 backedges. 2194 proven. 0 refuted. 0 times theorem prover too weak. 1178 trivial. 0 not checked. [2022-11-21 13:57:14,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:14,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176957916] [2022-11-21 13:57:14,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176957916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:14,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:14,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:14,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067493409] [2022-11-21 13:57:14,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:14,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:14,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:14,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:14,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:14,904 INFO L87 Difference]: Start difference. First operand 60034 states and 64138 transitions. Second operand has 3 states, 3 states have (on average 379.3333333333333) internal successors, (1138), 3 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:17,796 INFO L93 Difference]: Finished difference Result 124206 states and 132492 transitions. [2022-11-21 13:57:17,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:17,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 379.3333333333333) internal successors, (1138), 3 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1812 [2022-11-21 13:57:17,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:17,885 INFO L225 Difference]: With dead ends: 124206 [2022-11-21 13:57:17,885 INFO L226 Difference]: Without dead ends: 62104 [2022-11-21 13:57:17,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:17,921 INFO L413 NwaCegarLoop]: 793 mSDtfsCounter, 680 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:17,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 799 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 1777 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-21 13:57:17,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62104 states. [2022-11-21 13:57:18,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62104 to 60034. [2022-11-21 13:57:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60034 states, 60033 states have (on average 1.0575350224043443) internal successors, (63487), 60033 states have internal predecessors, (63487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:18,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60034 states to 60034 states and 63487 transitions. [2022-11-21 13:57:18,719 INFO L78 Accepts]: Start accepts. Automaton has 60034 states and 63487 transitions. Word has length 1812 [2022-11-21 13:57:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:18,720 INFO L495 AbstractCegarLoop]: Abstraction has 60034 states and 63487 transitions. [2022-11-21 13:57:18,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 379.3333333333333) internal successors, (1138), 3 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand 60034 states and 63487 transitions. [2022-11-21 13:57:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1940 [2022-11-21 13:57:18,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:18,801 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 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] [2022-11-21 13:57:18,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 13:57:18,802 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:18,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:18,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1544607047, now seen corresponding path program 1 times [2022-11-21 13:57:18,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:18,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060561937] [2022-11-21 13:57:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:18,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3190 backedges. 2366 proven. 0 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2022-11-21 13:57:22,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:22,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060561937] [2022-11-21 13:57:22,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060561937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:22,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:22,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:22,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005045356] [2022-11-21 13:57:22,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:22,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:22,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:22,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:22,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:22,895 INFO L87 Difference]: Start difference. First operand 60034 states and 63487 transitions. Second operand has 3 states, 3 states have (on average 469.0) internal successors, (1407), 3 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:25,984 INFO L93 Difference]: Finished difference Result 133176 states and 141776 transitions. [2022-11-21 13:57:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 469.0) internal successors, (1407), 3 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1939 [2022-11-21 13:57:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:26,066 INFO L225 Difference]: With dead ends: 133176 [2022-11-21 13:57:26,066 INFO L226 Difference]: Without dead ends: 73834 [2022-11-21 13:57:26,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:26,088 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 415 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 2341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:26,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 99 Invalid, 2341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-21 13:57:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73834 states. [2022-11-21 13:57:26,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73834 to 71764. [2022-11-21 13:57:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71764 states, 71763 states have (on average 1.0646433398826693) internal successors, (76402), 71763 states have internal predecessors, (76402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71764 states to 71764 states and 76402 transitions. [2022-11-21 13:57:26,795 INFO L78 Accepts]: Start accepts. Automaton has 71764 states and 76402 transitions. Word has length 1939 [2022-11-21 13:57:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:26,796 INFO L495 AbstractCegarLoop]: Abstraction has 71764 states and 76402 transitions. [2022-11-21 13:57:26,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 469.0) internal successors, (1407), 3 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:26,797 INFO L276 IsEmpty]: Start isEmpty. Operand 71764 states and 76402 transitions. [2022-11-21 13:57:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2032 [2022-11-21 13:57:27,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:27,140 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 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] [2022-11-21 13:57:27,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 13:57:27,141 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:27,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1649109942, now seen corresponding path program 1 times [2022-11-21 13:57:27,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:27,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194351982] [2022-11-21 13:57:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:27,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1649 proven. 34 refuted. 0 times theorem prover too weak. 1943 trivial. 0 not checked. [2022-11-21 13:57:30,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:30,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194351982] [2022-11-21 13:57:30,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194351982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:30,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053265497] [2022-11-21 13:57:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:30,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:30,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:30,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:30,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:57:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:30,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 13:57:30,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 2482 proven. 0 refuted. 0 times theorem prover too weak. 1144 trivial. 0 not checked. [2022-11-21 13:57:30,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:57:30,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053265497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:30,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:57:30,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-21 13:57:30,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259793794] [2022-11-21 13:57:30,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:30,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:30,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:30,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:30,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:57:30,897 INFO L87 Difference]: Start difference. First operand 71764 states and 76402 transitions. Second operand has 3 states, 3 states have (on average 378.3333333333333) internal successors, (1135), 3 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:33,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:33,798 INFO L93 Difference]: Finished difference Result 154566 states and 164897 transitions. [2022-11-21 13:57:33,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:33,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 378.3333333333333) internal successors, (1135), 3 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2031 [2022-11-21 13:57:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:33,872 INFO L225 Difference]: With dead ends: 154566 [2022-11-21 13:57:33,872 INFO L226 Difference]: Without dead ends: 83494 [2022-11-21 13:57:33,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2037 GetRequests, 2031 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:57:33,904 INFO L413 NwaCegarLoop]: 1064 mSDtfsCounter, 627 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:33,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1071 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1998 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-21 13:57:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83494 states. [2022-11-21 13:57:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83494 to 81424. [2022-11-21 13:57:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81424 states, 81423 states have (on average 1.0605725654913232) internal successors, (86355), 81423 states have internal predecessors, (86355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81424 states to 81424 states and 86355 transitions. [2022-11-21 13:57:34,787 INFO L78 Accepts]: Start accepts. Automaton has 81424 states and 86355 transitions. Word has length 2031 [2022-11-21 13:57:34,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:34,788 INFO L495 AbstractCegarLoop]: Abstraction has 81424 states and 86355 transitions. [2022-11-21 13:57:34,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 378.3333333333333) internal successors, (1135), 3 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 81424 states and 86355 transitions. [2022-11-21 13:57:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2081 [2022-11-21 13:57:34,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:34,863 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 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] [2022-11-21 13:57:34,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:35,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:35,065 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2121631070, now seen corresponding path program 1 times [2022-11-21 13:57:35,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:35,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815941555] [2022-11-21 13:57:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:35,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4157 backedges. 2368 proven. 1429 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-11-21 13:57:39,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:39,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815941555] [2022-11-21 13:57:39,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815941555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:39,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423460625] [2022-11-21 13:57:39,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:39,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:39,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:39,273 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:39,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:57:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:39,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 2385 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 13:57:39,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4157 backedges. 3058 proven. 0 refuted. 0 times theorem prover too weak. 1099 trivial. 0 not checked. [2022-11-21 13:57:40,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:57:40,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423460625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:40,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:57:40,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-21 13:57:40,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210083117] [2022-11-21 13:57:40,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:40,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:40,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:40,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:40,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:57:40,773 INFO L87 Difference]: Start difference. First operand 81424 states and 86355 transitions. Second operand has 3 states, 3 states have (on average 469.6666666666667) internal successors, (1409), 3 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:43,413 INFO L93 Difference]: Finished difference Result 160776 states and 170558 transitions. [2022-11-21 13:57:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 469.6666666666667) internal successors, (1409), 3 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2080 [2022-11-21 13:57:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:43,486 INFO L225 Difference]: With dead ends: 160776 [2022-11-21 13:57:43,486 INFO L226 Difference]: Without dead ends: 80044 [2022-11-21 13:57:43,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2086 GetRequests, 2080 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:57:43,667 INFO L413 NwaCegarLoop]: 989 mSDtfsCounter, 415 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:43,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 996 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1801 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-21 13:57:43,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80044 states. [2022-11-21 13:57:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80044 to 77284. [2022-11-21 13:57:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77284 states, 77283 states have (on average 1.041108652614417) internal successors, (80460), 77283 states have internal predecessors, (80460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77284 states to 77284 states and 80460 transitions. [2022-11-21 13:57:44,502 INFO L78 Accepts]: Start accepts. Automaton has 77284 states and 80460 transitions. Word has length 2080 [2022-11-21 13:57:44,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:44,503 INFO L495 AbstractCegarLoop]: Abstraction has 77284 states and 80460 transitions. [2022-11-21 13:57:44,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 469.6666666666667) internal successors, (1409), 3 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:44,504 INFO L276 IsEmpty]: Start isEmpty. Operand 77284 states and 80460 transitions. [2022-11-21 13:57:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2190 [2022-11-21 13:57:44,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:44,579 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 7, 7, 7, 7, 7, 7, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2022-11-21 13:57:44,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:44,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_865c794d-ca51-44bc-bccc-82c614ef6615/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 13:57:44,780 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:57:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:44,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1438603521, now seen corresponding path program 1 times [2022-11-21 13:57:44,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:44,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141417010] [2022-11-21 13:57:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:44,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat