./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/relax-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/relax-2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8 --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 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- 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-e04fb08 [2022-11-16 12:10:52,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:10:52,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:10:52,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:10:52,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:10:52,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:10:52,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:10:52,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:10:52,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:10:52,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:10:52,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:10:52,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:10:52,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:10:52,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:10:52,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:10:52,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:10:52,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:10:52,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:10:52,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:10:52,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:10:52,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:10:52,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:10:52,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:10:52,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:10:52,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:10:52,657 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:10:52,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:10:52,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:10:52,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:10:52,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:10:52,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:10:52,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:10:52,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:10:52,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:10:52,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:10:52,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:10:52,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:10:52,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:10:52,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:10:52,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:10:52,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:10:52,680 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:10:52,722 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:10:52,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:10:52,731 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:10:52,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:10:52,733 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:10:52,733 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:10:52,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:10:52,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:10:52,734 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:10:52,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:10:52,735 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:10:52,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:10:52,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:10:52,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:10:52,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:10:52,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:10:52,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:10:52,737 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:10:52,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:10:52,737 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:10:52,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:10:52,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:10:52,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:10:52,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:10:52,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:10:52,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:10:52,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:10:52,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:10:52,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:10:52,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:10:52,739 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:10:52,739 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:10:52,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:10:52,740 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_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2022-11-16 12:10:53,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:10:53,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:10:53,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:10:53,130 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:10:53,131 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:10:53,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-examples/relax-2-2.i [2022-11-16 12:10:53,241 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/data/0f9a288f3/c94e5973949346e480c6a979d2126e9c/FLAG6122f8111 [2022-11-16 12:10:53,810 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:10:53,811 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/sv-benchmarks/c/array-examples/relax-2-2.i [2022-11-16 12:10:53,832 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/data/0f9a288f3/c94e5973949346e480c6a979d2126e9c/FLAG6122f8111 [2022-11-16 12:10:54,083 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/data/0f9a288f3/c94e5973949346e480c6a979d2126e9c [2022-11-16 12:10:54,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:10:54,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:10:54,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:10:54,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:10:54,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:10:54,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d571c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54, skipping insertion in model container [2022-11-16 12:10:54,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:10:54,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:10:54,477 WARN L229 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_a928ac08-93ba-4094-a456-ab32e283ef6e/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2022-11-16 12:10:54,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:10:54,634 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:10:54,652 WARN L229 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_a928ac08-93ba-4094-a456-ab32e283ef6e/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2022-11-16 12:10:54,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:10:54,709 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:10:54,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54 WrapperNode [2022-11-16 12:10:54,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:10:54,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:10:54,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:10:54,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:10:54,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,792 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 137 [2022-11-16 12:10:54,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:10:54,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:10:54,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:10:54,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:10:54,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,841 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:10:54,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:10:54,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:10:54,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:10:54,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54" (1/1) ... [2022-11-16 12:10:54,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:10:54,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:10:54,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:10:54,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:10:54,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:10:54,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 12:10:54,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 12:10:54,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:10:54,948 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 12:10:54,948 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 12:10:54,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:10:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:10:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:10:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:10:54,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:10:55,152 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:10:55,169 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:10:55,609 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:10:55,617 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:10:55,617 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 12:10:55,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:10:55 BoogieIcfgContainer [2022-11-16 12:10:55,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:10:55,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:10:55,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:10:55,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:10:55,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:10:54" (1/3) ... [2022-11-16 12:10:55,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3877798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:10:55, skipping insertion in model container [2022-11-16 12:10:55,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:10:54" (2/3) ... [2022-11-16 12:10:55,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3877798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:10:55, skipping insertion in model container [2022-11-16 12:10:55,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:10:55" (3/3) ... [2022-11-16 12:10:55,635 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2022-11-16 12:10:55,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:10:55,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:10:55,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:10:55,730 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;@3a1312d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:10:55,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:10:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:10:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 12:10:55,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:55,745 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:55,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:10:55,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:55,752 INFO L85 PathProgramCache]: Analyzing trace with hash 424197970, now seen corresponding path program 1 times [2022-11-16 12:10:55,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:10:55,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470210961] [2022-11-16 12:10:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:10:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:55,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:10:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:56,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:10:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:10:56,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:10:56,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470210961] [2022-11-16 12:10:56,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470210961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:56,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:56,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:10:56,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036935031] [2022-11-16 12:10:56,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:56,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:10:56,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:10:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:10:56,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:10:56,079 INFO L87 Difference]: Start difference. First operand has 54 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:10:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:56,137 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2022-11-16 12:10:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:10:56,140 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-11-16 12:10:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:56,160 INFO L225 Difference]: With dead ends: 105 [2022-11-16 12:10:56,161 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 12:10:56,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:10:56,172 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:56,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:10:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 12:10:56,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-16 12:10:56,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.4) internal successors, (56), 41 states have internal predecessors, (56), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:10:56,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2022-11-16 12:10:56,228 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 24 [2022-11-16 12:10:56,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:56,228 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2022-11-16 12:10:56,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:10:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2022-11-16 12:10:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 12:10:56,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:56,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:56,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:10:56,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:10:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash 518459404, now seen corresponding path program 1 times [2022-11-16 12:10:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:10:56,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158646279] [2022-11-16 12:10:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:56,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:10:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:56,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:10:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:56,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:10:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:10:56,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:10:56,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158646279] [2022-11-16 12:10:56,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158646279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:56,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:56,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:10:56,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397014168] [2022-11-16 12:10:56,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:56,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:56,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:10:56,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:56,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:56,586 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:10:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:56,633 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2022-11-16 12:10:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:10:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-11-16 12:10:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:56,636 INFO L225 Difference]: With dead ends: 83 [2022-11-16 12:10:56,636 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 12:10:56,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:56,638 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:56,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 195 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:10:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 12:10:56,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-11-16 12:10:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.380952380952381) internal successors, (58), 43 states have internal predecessors, (58), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:10:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2022-11-16 12:10:56,659 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 24 [2022-11-16 12:10:56,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:56,662 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2022-11-16 12:10:56,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:10:56,664 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2022-11-16 12:10:56,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 12:10:56,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:56,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:56,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:10:56,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:10:56,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:56,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1090015461, now seen corresponding path program 1 times [2022-11-16 12:10:56,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:10:56,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753060970] [2022-11-16 12:10:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:56,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:10:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:56,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:10:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:56,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:10:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:10:57,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:10:57,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753060970] [2022-11-16 12:10:57,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753060970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:57,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:57,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:10:57,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665307243] [2022-11-16 12:10:57,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:57,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:10:57,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:10:57,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:10:57,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:10:57,004 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:10:57,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:57,184 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2022-11-16 12:10:57,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:10:57,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-16 12:10:57,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:57,186 INFO L225 Difference]: With dead ends: 108 [2022-11-16 12:10:57,186 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 12:10:57,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:57,188 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 50 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:57,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 284 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:10:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 12:10:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-11-16 12:10:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.396551724137931) internal successors, (81), 59 states have internal predecessors, (81), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:10:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2022-11-16 12:10:57,200 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 26 [2022-11-16 12:10:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:57,201 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2022-11-16 12:10:57,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:10:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2022-11-16 12:10:57,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 12:10:57,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:57,203 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:57,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:10:57,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:10:57,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:57,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1637522002, now seen corresponding path program 1 times [2022-11-16 12:10:57,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:10:57,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973474225] [2022-11-16 12:10:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:57,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:10:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:57,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:10:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:57,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:10:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:10:57,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:10:57,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973474225] [2022-11-16 12:10:57,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973474225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:57,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:57,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:10:57,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141110238] [2022-11-16 12:10:57,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:57,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:10:57,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:10:57,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:10:57,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:10:57,795 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:10:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:58,111 INFO L93 Difference]: Finished difference Result 110 states and 147 transitions. [2022-11-16 12:10:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:10:58,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-11-16 12:10:58,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:58,113 INFO L225 Difference]: With dead ends: 110 [2022-11-16 12:10:58,114 INFO L226 Difference]: Without dead ends: 98 [2022-11-16 12:10:58,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:10:58,116 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 121 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:58,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 350 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:10:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-16 12:10:58,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2022-11-16 12:10:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 67 states have internal predecessors, (93), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:10:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2022-11-16 12:10:58,148 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 27 [2022-11-16 12:10:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:58,149 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2022-11-16 12:10:58,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:10:58,149 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2022-11-16 12:10:58,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 12:10:58,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:58,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:58,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:10:58,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:10:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:58,154 INFO L85 PathProgramCache]: Analyzing trace with hash -703814141, now seen corresponding path program 1 times [2022-11-16 12:10:58,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:10:58,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989550202] [2022-11-16 12:10:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:58,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:10:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:58,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:10:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:58,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:10:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:10:58,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:10:58,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989550202] [2022-11-16 12:10:58,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989550202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:10:58,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681464418] [2022-11-16 12:10:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:58,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:10:58,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:10:58,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:10:58,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:10:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:58,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:10:59,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:59,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681464418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:59,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:10:59,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2022-11-16 12:10:59,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494651551] [2022-11-16 12:10:59,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:59,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:10:59,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:10:59,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:10:59,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:10:59,182 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:10:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:59,357 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2022-11-16 12:10:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:10:59,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-16 12:10:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:59,360 INFO L225 Difference]: With dead ends: 88 [2022-11-16 12:10:59,360 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 12:10:59,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:10:59,362 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 76 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:59,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 186 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:10:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 12:10:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-11-16 12:10:59,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.391304347826087) internal successors, (96), 70 states have internal predecessors, (96), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:10:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 109 transitions. [2022-11-16 12:10:59,382 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 109 transitions. Word has length 28 [2022-11-16 12:10:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:59,382 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 109 transitions. [2022-11-16 12:10:59,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:10:59,383 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2022-11-16 12:10:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 12:10:59,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:59,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:59,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:59,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:10:59,590 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:10:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:59,591 INFO L85 PathProgramCache]: Analyzing trace with hash 338610741, now seen corresponding path program 1 times [2022-11-16 12:10:59,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:10:59,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100673656] [2022-11-16 12:10:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:59,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:10:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:59,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:10:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:59,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:10:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:10:59,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:10:59,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100673656] [2022-11-16 12:10:59,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100673656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:59,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:59,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:10:59,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829775884] [2022-11-16 12:10:59,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:59,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:59,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:10:59,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:59,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:59,684 INFO L87 Difference]: Start difference. First operand 80 states and 109 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:10:59,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:59,722 INFO L93 Difference]: Finished difference Result 97 states and 128 transitions. [2022-11-16 12:10:59,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:10:59,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-11-16 12:10:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:59,728 INFO L225 Difference]: With dead ends: 97 [2022-11-16 12:10:59,728 INFO L226 Difference]: Without dead ends: 79 [2022-11-16 12:10:59,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:59,734 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 17 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:59,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 175 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:10:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-16 12:10:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-16 12:10:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:10:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2022-11-16 12:10:59,768 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 29 [2022-11-16 12:10:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:59,770 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2022-11-16 12:10:59,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:10:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2022-11-16 12:10:59,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 12:10:59,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:59,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:59,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:10:59,778 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:10:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:59,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1088390000, now seen corresponding path program 1 times [2022-11-16 12:10:59,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:10:59,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132372650] [2022-11-16 12:10:59,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:59,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:10:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:59,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:10:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:59,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:10:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:10:59,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:10:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132372650] [2022-11-16 12:10:59,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132372650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:59,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:59,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:10:59,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125524658] [2022-11-16 12:10:59,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:59,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:10:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:10:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:10:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:59,952 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:00,049 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2022-11-16 12:11:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:00,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-11-16 12:11:00,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:00,050 INFO L225 Difference]: With dead ends: 90 [2022-11-16 12:11:00,051 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 12:11:00,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:00,056 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 12 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:00,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 227 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:11:00,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 12:11:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-11-16 12:11:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.326086956521739) internal successors, (61), 47 states have internal predecessors, (61), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:11:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2022-11-16 12:11:00,072 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2022-11-16 12:11:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:00,073 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-11-16 12:11:00,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2022-11-16 12:11:00,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 12:11:00,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:00,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:00,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:11:00,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:00,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1413511858, now seen corresponding path program 1 times [2022-11-16 12:11:00,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:00,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222378270] [2022-11-16 12:11:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:00,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:00,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:00,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:11:00,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:00,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222378270] [2022-11-16 12:11:00,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222378270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:00,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142804712] [2022-11-16 12:11:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:00,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:00,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:00,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:00,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:11:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:00,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:11:00,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:00,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:00,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142804712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:00,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:11:00,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-11-16 12:11:00,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151094120] [2022-11-16 12:11:00,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:00,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:00,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:00,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:00,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:11:00,705 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:00,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:00,820 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2022-11-16 12:11:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:11:00,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-11-16 12:11:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:00,822 INFO L225 Difference]: With dead ends: 71 [2022-11-16 12:11:00,822 INFO L226 Difference]: Without dead ends: 57 [2022-11-16 12:11:00,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:11:00,824 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 39 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:00,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 114 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:11:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-16 12:11:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-16 12:11:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:11:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2022-11-16 12:11:00,841 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 29 [2022-11-16 12:11:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:00,841 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2022-11-16 12:11:00,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:00,842 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2022-11-16 12:11:00,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 12:11:00,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:00,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:00,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:01,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:01,059 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:01,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:01,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1264785641, now seen corresponding path program 1 times [2022-11-16 12:11:01,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:01,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540603381] [2022-11-16 12:11:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:01,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:01,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:01,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:01,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:01,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540603381] [2022-11-16 12:11:01,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540603381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:01,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:01,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:11:01,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931570553] [2022-11-16 12:11:01,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:01,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:11:01,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:01,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:11:01,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:11:01,113 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:01,139 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2022-11-16 12:11:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:11:01,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-11-16 12:11:01,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:01,141 INFO L225 Difference]: With dead ends: 93 [2022-11-16 12:11:01,141 INFO L226 Difference]: Without dead ends: 79 [2022-11-16 12:11:01,141 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 [2022-11-16 12:11:01,144 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:01,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 130 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:11:01,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-16 12:11:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2022-11-16 12:11:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:11:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-11-16 12:11:01,156 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 31 [2022-11-16 12:11:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:01,158 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-11-16 12:11:01,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:01,158 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-11-16 12:11:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 12:11:01,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:01,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:01,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:11:01,161 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:01,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:01,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1196949427, now seen corresponding path program 1 times [2022-11-16 12:11:01,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:01,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682498831] [2022-11-16 12:11:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:01,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:01,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:01,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:01,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:01,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682498831] [2022-11-16 12:11:01,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682498831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:01,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690978175] [2022-11-16 12:11:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:01,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:01,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:01,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:01,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:11:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:01,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:11:01,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:01,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:01,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690978175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:01,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:11:01,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-16 12:11:01,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067873412] [2022-11-16 12:11:01,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:01,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:11:01,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:11:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:11:01,621 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:01,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:01,751 INFO L93 Difference]: Finished difference Result 124 states and 160 transitions. [2022-11-16 12:11:01,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:11:01,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-11-16 12:11:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:01,752 INFO L225 Difference]: With dead ends: 124 [2022-11-16 12:11:01,752 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 12:11:01,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:11:01,754 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 39 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:01,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 232 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:11:01,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 12:11:01,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-11-16 12:11:01,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 53 states have internal predecessors, (68), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:11:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2022-11-16 12:11:01,763 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 35 [2022-11-16 12:11:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:01,765 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2022-11-16 12:11:01,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2022-11-16 12:11:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 12:11:01,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:01,767 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:01,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:01,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:11:01,972 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1163666735, now seen corresponding path program 1 times [2022-11-16 12:11:01,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:01,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403494858] [2022-11-16 12:11:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:01,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:02,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:02,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:02,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:02,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403494858] [2022-11-16 12:11:02,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403494858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:02,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676246503] [2022-11-16 12:11:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:02,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:02,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:02,131 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:02,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:11:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:02,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:02,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:02,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:02,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676246503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:02,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:02,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 15 [2022-11-16 12:11:02,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271303640] [2022-11-16 12:11:02,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:02,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:11:02,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:02,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:11:02,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:11:02,657 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:02,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:02,930 INFO L93 Difference]: Finished difference Result 148 states and 198 transitions. [2022-11-16 12:11:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:11:02,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-16 12:11:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:02,932 INFO L225 Difference]: With dead ends: 148 [2022-11-16 12:11:02,932 INFO L226 Difference]: Without dead ends: 125 [2022-11-16 12:11:02,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:11:02,934 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 150 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:02,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 684 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:11:02,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-16 12:11:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2022-11-16 12:11:02,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-11-16 12:11:02,949 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 37 [2022-11-16 12:11:02,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:02,949 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-11-16 12:11:02,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-11-16 12:11:02,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 12:11:02,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:02,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:02,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:03,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:03,156 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:03,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:03,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1165513777, now seen corresponding path program 1 times [2022-11-16 12:11:03,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:03,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520801826] [2022-11-16 12:11:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:03,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:03,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:03,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:03,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:03,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520801826] [2022-11-16 12:11:03,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520801826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:03,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503699664] [2022-11-16 12:11:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:03,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:03,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:03,625 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:03,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:11:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:03,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:11:03,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:11:03,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:03,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503699664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:03,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:11:03,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-11-16 12:11:03,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346880626] [2022-11-16 12:11:03,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:03,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:03,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:03,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:03,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:11:03,809 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:03,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:03,922 INFO L93 Difference]: Finished difference Result 127 states and 166 transitions. [2022-11-16 12:11:03,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:11:03,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-16 12:11:03,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:03,925 INFO L225 Difference]: With dead ends: 127 [2022-11-16 12:11:03,925 INFO L226 Difference]: Without dead ends: 113 [2022-11-16 12:11:03,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:11:03,926 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 55 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:03,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 141 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:11:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-16 12:11:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2022-11-16 12:11:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 88 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2022-11-16 12:11:03,948 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 37 [2022-11-16 12:11:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:03,948 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2022-11-16 12:11:03,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2022-11-16 12:11:03,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 12:11:03,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:03,949 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:11:03,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:04,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:04,155 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2034579695, now seen corresponding path program 1 times [2022-11-16 12:11:04,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:04,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682220855] [2022-11-16 12:11:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:04,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:04,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:04,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:11:04,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:04,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682220855] [2022-11-16 12:11:04,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682220855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:04,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021123262] [2022-11-16 12:11:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:04,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:04,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:04,413 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:04,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:11:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:04,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:11:04,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:11:04,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:04,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021123262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:04,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:04,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 18 [2022-11-16 12:11:04,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030670925] [2022-11-16 12:11:04,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:04,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:11:04,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:04,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:11:04,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:11:04,801 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:05,500 INFO L93 Difference]: Finished difference Result 269 states and 362 transitions. [2022-11-16 12:11:05,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:11:05,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-11-16 12:11:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:05,503 INFO L225 Difference]: With dead ends: 269 [2022-11-16 12:11:05,503 INFO L226 Difference]: Without dead ends: 192 [2022-11-16 12:11:05,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:11:05,505 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 466 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:05,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 622 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:11:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-16 12:11:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 122. [2022-11-16 12:11:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.3) internal successors, (143), 111 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2022-11-16 12:11:05,545 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 38 [2022-11-16 12:11:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:05,545 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2022-11-16 12:11:05,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2022-11-16 12:11:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 12:11:05,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:05,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:05,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:05,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:11:05,753 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:05,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:05,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2103922323, now seen corresponding path program 1 times [2022-11-16 12:11:05,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:05,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498479811] [2022-11-16 12:11:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:05,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:05,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:05,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:05,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:11:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:05,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:05,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498479811] [2022-11-16 12:11:05,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498479811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:05,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917196108] [2022-11-16 12:11:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:05,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:05,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:05,956 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:05,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:11:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:06,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:06,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:06,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:06,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917196108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:06,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:11:06,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-16 12:11:06,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359673156] [2022-11-16 12:11:06,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:06,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:11:06,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:06,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:11:06,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:11:06,178 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:11:06,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:06,340 INFO L93 Difference]: Finished difference Result 167 states and 214 transitions. [2022-11-16 12:11:06,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:11:06,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-11-16 12:11:06,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:06,342 INFO L225 Difference]: With dead ends: 167 [2022-11-16 12:11:06,342 INFO L226 Difference]: Without dead ends: 132 [2022-11-16 12:11:06,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:11:06,343 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 63 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:06,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 138 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:11:06,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-16 12:11:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-11-16 12:11:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.2767857142857142) internal successors, (143), 113 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-11-16 12:11:06,395 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 42 [2022-11-16 12:11:06,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:06,396 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-11-16 12:11:06,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:11:06,396 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-11-16 12:11:06,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 12:11:06,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:06,397 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:11:06,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:06,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:11:06,598 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:06,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1093284825, now seen corresponding path program 1 times [2022-11-16 12:11:06,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:06,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930692962] [2022-11-16 12:11:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:06,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:06,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:06,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:11:06,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:06,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930692962] [2022-11-16 12:11:06,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930692962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:06,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247177755] [2022-11-16 12:11:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:06,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:06,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:06,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:06,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:11:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:06,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:11:06,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:07,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:11:07,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247177755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:07,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:07,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2022-11-16 12:11:07,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064981612] [2022-11-16 12:11:07,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:07,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:11:07,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:07,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:11:07,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:11:07,268 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:08,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:08,860 INFO L93 Difference]: Finished difference Result 350 states and 484 transitions. [2022-11-16 12:11:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:11:08,863 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-11-16 12:11:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:08,865 INFO L225 Difference]: With dead ends: 350 [2022-11-16 12:11:08,865 INFO L226 Difference]: Without dead ends: 320 [2022-11-16 12:11:08,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 12:11:08,867 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 585 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:08,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1260 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:11:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-16 12:11:08,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 166. [2022-11-16 12:11:08,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 154 states have (on average 1.3311688311688312) internal successors, (205), 155 states have internal predecessors, (205), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 220 transitions. [2022-11-16 12:11:08,910 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 220 transitions. Word has length 42 [2022-11-16 12:11:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:08,911 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 220 transitions. [2022-11-16 12:11:08,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:08,911 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 220 transitions. [2022-11-16 12:11:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 12:11:08,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:08,912 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:11:08,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:09,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:11:09,124 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1902631451, now seen corresponding path program 1 times [2022-11-16 12:11:09,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:09,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760874997] [2022-11-16 12:11:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:09,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:09,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:09,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:11:09,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:09,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760874997] [2022-11-16 12:11:09,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760874997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:09,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328685666] [2022-11-16 12:11:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:09,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:09,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:09,995 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:10,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:11:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:10,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-16 12:11:10,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:10,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:11:10,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:11:10,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:11:10,607 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-11-16 12:11:10,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2022-11-16 12:11:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:11:10,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:11:11,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328685666] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:11,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:11:11,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11, 17] total 31 [2022-11-16 12:11:11,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166347747] [2022-11-16 12:11:11,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:11,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:11:11,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:11,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:11:11,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:11:11,019 INFO L87 Difference]: Start difference. First operand 166 states and 220 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:11,649 INFO L93 Difference]: Finished difference Result 297 states and 404 transitions. [2022-11-16 12:11:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:11:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-11-16 12:11:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:11,651 INFO L225 Difference]: With dead ends: 297 [2022-11-16 12:11:11,652 INFO L226 Difference]: Without dead ends: 288 [2022-11-16 12:11:11,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 12:11:11,653 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 139 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:11,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 676 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:11:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-16 12:11:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 207. [2022-11-16 12:11:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 195 states have (on average 1.353846153846154) internal successors, (264), 196 states have internal predecessors, (264), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 279 transitions. [2022-11-16 12:11:11,708 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 279 transitions. Word has length 42 [2022-11-16 12:11:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:11,708 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 279 transitions. [2022-11-16 12:11:11,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 279 transitions. [2022-11-16 12:11:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:11:11,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:11,709 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:11,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 12:11:11,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:11:11,915 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:11,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:11,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1797758865, now seen corresponding path program 1 times [2022-11-16 12:11:11,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:11,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211908185] [2022-11-16 12:11:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:11,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:12,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:12,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:11:12,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:12,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211908185] [2022-11-16 12:11:12,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211908185] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:12,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076284346] [2022-11-16 12:11:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:12,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:12,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:12,295 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:12,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:11:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:12,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:11:12,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:11:12,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:11:12,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076284346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:12,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:12,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-11-16 12:11:12,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19353565] [2022-11-16 12:11:12,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:12,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:11:12,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:12,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:11:12,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:11:12,644 INFO L87 Difference]: Start difference. First operand 207 states and 279 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:13,109 INFO L93 Difference]: Finished difference Result 258 states and 342 transitions. [2022-11-16 12:11:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:11:13,110 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-11-16 12:11:13,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:13,113 INFO L225 Difference]: With dead ends: 258 [2022-11-16 12:11:13,114 INFO L226 Difference]: Without dead ends: 182 [2022-11-16 12:11:13,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:11:13,115 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 175 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:13,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 648 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:11:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-16 12:11:13,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2022-11-16 12:11:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 146 states have (on average 1.321917808219178) internal successors, (193), 147 states have internal predecessors, (193), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:13,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 208 transitions. [2022-11-16 12:11:13,163 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 208 transitions. Word has length 43 [2022-11-16 12:11:13,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:13,164 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 208 transitions. [2022-11-16 12:11:13,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:13,164 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 208 transitions. [2022-11-16 12:11:13,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 12:11:13,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:13,165 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:13,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:13,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:11:13,371 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:13,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2052626821, now seen corresponding path program 1 times [2022-11-16 12:11:13,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:13,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706577554] [2022-11-16 12:11:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:13,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:13,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:13,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:13,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-16 12:11:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:13,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:13,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706577554] [2022-11-16 12:11:13,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706577554] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:13,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571605666] [2022-11-16 12:11:13,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:13,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:13,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:13,574 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:13,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:11:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:13,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:11:13,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:11:13,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:13,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571605666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:13,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:11:13,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-16 12:11:13,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905991353] [2022-11-16 12:11:13,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:13,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:11:13,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:11:13,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:11:13,697 INFO L87 Difference]: Start difference. First operand 158 states and 208 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:11:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:13,791 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2022-11-16 12:11:13,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:11:13,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-11-16 12:11:13,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:13,793 INFO L225 Difference]: With dead ends: 188 [2022-11-16 12:11:13,793 INFO L226 Difference]: Without dead ends: 167 [2022-11-16 12:11:13,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:11:13,794 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:13,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:11:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-16 12:11:13,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 162. [2022-11-16 12:11:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.3266666666666667) internal successors, (199), 151 states have internal predecessors, (199), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 214 transitions. [2022-11-16 12:11:13,838 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 214 transitions. Word has length 45 [2022-11-16 12:11:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:13,838 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 214 transitions. [2022-11-16 12:11:13,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:11:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 214 transitions. [2022-11-16 12:11:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 12:11:13,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:13,840 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:11:13,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:14,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:11:14,051 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:14,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1015993583, now seen corresponding path program 2 times [2022-11-16 12:11:14,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:14,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651156611] [2022-11-16 12:11:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:14,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:14,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:14,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:11:14,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:14,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651156611] [2022-11-16 12:11:14,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651156611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:14,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512507170] [2022-11-16 12:11:14,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:14,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:14,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:14,607 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:14,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:11:14,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:11:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:14,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:11:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:11:14,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:11:15,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512507170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:15,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:15,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 24 [2022-11-16 12:11:15,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362856347] [2022-11-16 12:11:15,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:15,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:11:15,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:11:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:11:15,270 INFO L87 Difference]: Start difference. First operand 162 states and 214 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:17,984 INFO L93 Difference]: Finished difference Result 661 states and 912 transitions. [2022-11-16 12:11:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 12:11:17,985 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-11-16 12:11:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:17,989 INFO L225 Difference]: With dead ends: 661 [2022-11-16 12:11:17,989 INFO L226 Difference]: Without dead ends: 551 [2022-11-16 12:11:17,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=584, Invalid=2608, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 12:11:17,992 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 796 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:17,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 1346 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:11:17,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-11-16 12:11:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 236. [2022-11-16 12:11:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 224 states have (on average 1.34375) internal successors, (301), 225 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 316 transitions. [2022-11-16 12:11:18,099 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 316 transitions. Word has length 45 [2022-11-16 12:11:18,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:18,101 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 316 transitions. [2022-11-16 12:11:18,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 316 transitions. [2022-11-16 12:11:18,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 12:11:18,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:18,106 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:11:18,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:18,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:18,313 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:18,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:18,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1957197463, now seen corresponding path program 1 times [2022-11-16 12:11:18,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:18,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180766936] [2022-11-16 12:11:18,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:18,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:19,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:19,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:11:19,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:19,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180766936] [2022-11-16 12:11:19,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180766936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:19,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184541577] [2022-11-16 12:11:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:19,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:19,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:19,828 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:19,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:11:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:19,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 12:11:19,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:20,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:11:20,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:11:20,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:11:20,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:11:20,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:11:20,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 42 [2022-11-16 12:11:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:20,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:21,231 INFO L321 Elim1Store]: treesize reduction 17, result has 83.0 percent of original size [2022-11-16 12:11:21,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 90 [2022-11-16 12:11:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:11:22,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184541577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:22,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:22,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 12] total 33 [2022-11-16 12:11:22,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844823483] [2022-11-16 12:11:22,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:22,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:11:22,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:22,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:11:22,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:11:22,048 INFO L87 Difference]: Start difference. First operand 236 states and 316 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:25,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:25,287 INFO L93 Difference]: Finished difference Result 587 states and 796 transitions. [2022-11-16 12:11:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:11:25,288 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-11-16 12:11:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:25,290 INFO L225 Difference]: With dead ends: 587 [2022-11-16 12:11:25,290 INFO L226 Difference]: Without dead ends: 455 [2022-11-16 12:11:25,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 12:11:25,291 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 416 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:25,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 1928 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1818 Invalid, 0 Unknown, 91 Unchecked, 1.7s Time] [2022-11-16 12:11:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-16 12:11:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 260. [2022-11-16 12:11:25,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 248 states have (on average 1.3346774193548387) internal successors, (331), 249 states have internal predecessors, (331), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 346 transitions. [2022-11-16 12:11:25,381 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 346 transitions. Word has length 48 [2022-11-16 12:11:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:25,382 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 346 transitions. [2022-11-16 12:11:25,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:25,382 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 346 transitions. [2022-11-16 12:11:25,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 12:11:25,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:25,384 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:11:25,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:25,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:25,599 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:25,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1256132885, now seen corresponding path program 1 times [2022-11-16 12:11:25,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:25,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608960684] [2022-11-16 12:11:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:25,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:11:26,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:26,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608960684] [2022-11-16 12:11:26,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608960684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:26,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961522021] [2022-11-16 12:11:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:26,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:26,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:26,902 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:26,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:11:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:27,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 12:11:27,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:27,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:11:27,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:11:27,351 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-11-16 12:11:27,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2022-11-16 12:11:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:11:27,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:27,657 INFO L321 Elim1Store]: treesize reduction 15, result has 84.2 percent of original size [2022-11-16 12:11:27,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 87 [2022-11-16 12:11:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:11:28,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961522021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:28,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:28,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 28 [2022-11-16 12:11:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454173941] [2022-11-16 12:11:28,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:28,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:11:28,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:11:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:11:28,011 INFO L87 Difference]: Start difference. First operand 260 states and 346 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:29,006 INFO L93 Difference]: Finished difference Result 487 states and 655 transitions. [2022-11-16 12:11:29,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:11:29,007 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-11-16 12:11:29,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:29,009 INFO L225 Difference]: With dead ends: 487 [2022-11-16 12:11:29,010 INFO L226 Difference]: Without dead ends: 355 [2022-11-16 12:11:29,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:11:29,012 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 271 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:29,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 879 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:11:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-16 12:11:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 243. [2022-11-16 12:11:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 231 states have (on average 1.303030303030303) internal successors, (301), 232 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 316 transitions. [2022-11-16 12:11:29,105 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 316 transitions. Word has length 48 [2022-11-16 12:11:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:29,106 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 316 transitions. [2022-11-16 12:11:29,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 316 transitions. [2022-11-16 12:11:29,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 12:11:29,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:29,108 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:29,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:29,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:29,313 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:29,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:29,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1737037141, now seen corresponding path program 1 times [2022-11-16 12:11:29,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:29,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670688510] [2022-11-16 12:11:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:29,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:29,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:29,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:29,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-16 12:11:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:11:29,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:29,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670688510] [2022-11-16 12:11:29,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670688510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:29,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:29,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:11:29,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280360470] [2022-11-16 12:11:29,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:29,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:29,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:29,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:29,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:29,396 INFO L87 Difference]: Start difference. First operand 243 states and 316 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:11:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:29,517 INFO L93 Difference]: Finished difference Result 266 states and 343 transitions. [2022-11-16 12:11:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:11:29,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-11-16 12:11:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:29,520 INFO L225 Difference]: With dead ends: 266 [2022-11-16 12:11:29,520 INFO L226 Difference]: Without dead ends: 244 [2022-11-16 12:11:29,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:29,522 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:29,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 117 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:11:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-16 12:11:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2022-11-16 12:11:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 230 states have (on average 1.2956521739130435) internal successors, (298), 231 states have internal predecessors, (298), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 313 transitions. [2022-11-16 12:11:29,615 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 313 transitions. Word has length 50 [2022-11-16 12:11:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:29,615 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 313 transitions. [2022-11-16 12:11:29,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:11:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 313 transitions. [2022-11-16 12:11:29,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 12:11:29,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:29,617 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:29,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 12:11:29,618 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:29,618 INFO L85 PathProgramCache]: Analyzing trace with hash -23820843, now seen corresponding path program 1 times [2022-11-16 12:11:29,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:29,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459054622] [2022-11-16 12:11:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:29,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:29,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:29,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:11:29,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:29,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459054622] [2022-11-16 12:11:29,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459054622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:29,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077467141] [2022-11-16 12:11:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:29,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:29,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:29,949 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:29,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:11:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:30,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:11:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:11:30,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:11:30,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077467141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:30,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:30,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-11-16 12:11:30,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820117636] [2022-11-16 12:11:30,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:30,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:11:30,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:30,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:11:30,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:11:30,683 INFO L87 Difference]: Start difference. First operand 242 states and 313 transitions. Second operand has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:34,181 INFO L93 Difference]: Finished difference Result 689 states and 913 transitions. [2022-11-16 12:11:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 12:11:34,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-11-16 12:11:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:34,185 INFO L225 Difference]: With dead ends: 689 [2022-11-16 12:11:34,185 INFO L226 Difference]: Without dead ends: 681 [2022-11-16 12:11:34,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=662, Invalid=3628, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 12:11:34,187 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 1772 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:34,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1772 Valid, 1876 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 12:11:34,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-11-16 12:11:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 245. [2022-11-16 12:11:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 233 states have (on average 1.2918454935622317) internal successors, (301), 234 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 316 transitions. [2022-11-16 12:11:34,290 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 316 transitions. Word has length 49 [2022-11-16 12:11:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:34,290 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 316 transitions. [2022-11-16 12:11:34,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 316 transitions. [2022-11-16 12:11:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 12:11:34,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:34,292 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-16 12:11:34,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:34,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 12:11:34,498 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash -319274875, now seen corresponding path program 1 times [2022-11-16 12:11:34,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:34,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066656968] [2022-11-16 12:11:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:34,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:34,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:34,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:11:34,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:34,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066656968] [2022-11-16 12:11:34,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066656968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:34,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271211605] [2022-11-16 12:11:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:34,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:34,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:34,911 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:34,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:11:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:35,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:11:35,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:11:35,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:11:35,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271211605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:35,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:35,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2022-11-16 12:11:35,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85241553] [2022-11-16 12:11:35,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:35,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:11:35,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:35,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:11:35,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:11:35,460 INFO L87 Difference]: Start difference. First operand 245 states and 316 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:37,252 INFO L93 Difference]: Finished difference Result 727 states and 955 transitions. [2022-11-16 12:11:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:11:37,253 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-11-16 12:11:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:37,256 INFO L225 Difference]: With dead ends: 727 [2022-11-16 12:11:37,256 INFO L226 Difference]: Without dead ends: 565 [2022-11-16 12:11:37,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 12:11:37,258 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 1241 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:37,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1245 Valid, 1306 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:11:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-16 12:11:37,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 273. [2022-11-16 12:11:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 261 states have (on average 1.3026819923371646) internal successors, (340), 262 states have internal predecessors, (340), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 355 transitions. [2022-11-16 12:11:37,372 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 355 transitions. Word has length 51 [2022-11-16 12:11:37,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:37,372 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 355 transitions. [2022-11-16 12:11:37,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:37,373 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 355 transitions. [2022-11-16 12:11:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 12:11:37,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:37,374 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:37,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:37,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 12:11:37,583 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash -175162644, now seen corresponding path program 1 times [2022-11-16 12:11:37,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:37,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105146479] [2022-11-16 12:11:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:37,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:37,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:37,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:37,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-16 12:11:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:37,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:11:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:11:37,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:37,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105146479] [2022-11-16 12:11:37,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105146479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:37,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92655851] [2022-11-16 12:11:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:37,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:37,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:37,827 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:37,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:11:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:37,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:11:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:11:38,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:11:38,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92655851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:38,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:38,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-16 12:11:38,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760596740] [2022-11-16 12:11:38,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:38,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:11:38,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:38,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:11:38,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:11:38,178 INFO L87 Difference]: Start difference. First operand 273 states and 355 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-16 12:11:38,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:38,644 INFO L93 Difference]: Finished difference Result 331 states and 427 transitions. [2022-11-16 12:11:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:11:38,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 54 [2022-11-16 12:11:38,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:38,647 INFO L225 Difference]: With dead ends: 331 [2022-11-16 12:11:38,647 INFO L226 Difference]: Without dead ends: 281 [2022-11-16 12:11:38,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:11:38,648 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 108 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:38,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 522 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:11:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-16 12:11:38,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 271. [2022-11-16 12:11:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 258 states have (on average 1.302325581395349) internal successors, (336), 259 states have internal predecessors, (336), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:11:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 353 transitions. [2022-11-16 12:11:38,783 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 353 transitions. Word has length 54 [2022-11-16 12:11:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:38,783 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 353 transitions. [2022-11-16 12:11:38,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-16 12:11:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 353 transitions. [2022-11-16 12:11:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 12:11:38,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:38,785 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-16 12:11:38,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:38,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:38,991 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:38,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:38,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1379742433, now seen corresponding path program 2 times [2022-11-16 12:11:38,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:38,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623187000] [2022-11-16 12:11:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:38,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:40,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:40,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:11:40,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:40,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623187000] [2022-11-16 12:11:40,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623187000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:40,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118564862] [2022-11-16 12:11:40,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:40,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:40,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:40,297 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:40,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:11:40,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:11:40,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:40,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 12:11:40,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:40,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:11:41,047 INFO L321 Elim1Store]: treesize reduction 38, result has 47.9 percent of original size [2022-11-16 12:11:41,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 70 [2022-11-16 12:11:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:41,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:11:41,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118564862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:41,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:41,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 40 [2022-11-16 12:11:41,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012264752] [2022-11-16 12:11:41,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:41,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 12:11:41,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 12:11:41,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1377, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:11:41,777 INFO L87 Difference]: Start difference. First operand 271 states and 353 transitions. Second operand has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:11:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:43,874 INFO L93 Difference]: Finished difference Result 574 states and 769 transitions. [2022-11-16 12:11:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:11:43,875 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-11-16 12:11:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:43,878 INFO L225 Difference]: With dead ends: 574 [2022-11-16 12:11:43,878 INFO L226 Difference]: Without dead ends: 513 [2022-11-16 12:11:43,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=363, Invalid=2499, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 12:11:43,880 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 373 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:43,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1805 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 12:11:43,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-11-16 12:11:43,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 310. [2022-11-16 12:11:43,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 297 states have (on average 1.3097643097643097) internal successors, (389), 298 states have internal predecessors, (389), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:11:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 406 transitions. [2022-11-16 12:11:43,995 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 406 transitions. Word has length 52 [2022-11-16 12:11:43,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:43,996 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 406 transitions. [2022-11-16 12:11:43,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:11:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 406 transitions. [2022-11-16 12:11:43,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 12:11:43,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:43,998 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:44,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-16 12:11:44,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:44,204 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:44,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1170436455, now seen corresponding path program 2 times [2022-11-16 12:11:44,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:44,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201560788] [2022-11-16 12:11:44,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:44,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:44,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:44,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:11:44,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:44,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201560788] [2022-11-16 12:11:44,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201560788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:44,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204424076] [2022-11-16 12:11:44,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:44,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:44,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:44,657 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:44,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:11:44,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:11:44,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:44,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:11:44,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:11:44,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:11:45,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204424076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:45,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:45,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-11-16 12:11:45,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254585905] [2022-11-16 12:11:45,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:45,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:11:45,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:11:45,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:11:45,198 INFO L87 Difference]: Start difference. First operand 310 states and 406 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:46,038 INFO L93 Difference]: Finished difference Result 424 states and 552 transitions. [2022-11-16 12:11:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:11:46,039 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2022-11-16 12:11:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:46,041 INFO L225 Difference]: With dead ends: 424 [2022-11-16 12:11:46,041 INFO L226 Difference]: Without dead ends: 329 [2022-11-16 12:11:46,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:11:46,044 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 385 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:46,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 880 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:11:46,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-16 12:11:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 252. [2022-11-16 12:11:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 239 states have (on average 1.292887029288703) internal successors, (309), 240 states have internal predecessors, (309), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:11:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 326 transitions. [2022-11-16 12:11:46,163 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 326 transitions. Word has length 53 [2022-11-16 12:11:46,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:46,164 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 326 transitions. [2022-11-16 12:11:46,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:46,164 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 326 transitions. [2022-11-16 12:11:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 12:11:46,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:46,165 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-16 12:11:46,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:46,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:11:46,371 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash -610707989, now seen corresponding path program 3 times [2022-11-16 12:11:46,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:46,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755679918] [2022-11-16 12:11:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:46,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:46,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:46,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:11:46,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:46,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755679918] [2022-11-16 12:11:46,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755679918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:46,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498572323] [2022-11-16 12:11:46,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:11:46,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:46,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:46,601 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:46,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:11:47,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 12:11:47,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:47,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:11:47,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:11:47,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:11:47,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498572323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:47,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:47,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-11-16 12:11:47,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994494615] [2022-11-16 12:11:47,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:47,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:11:47,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:47,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:11:47,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:11:47,446 INFO L87 Difference]: Start difference. First operand 252 states and 326 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:48,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:48,258 INFO L93 Difference]: Finished difference Result 301 states and 385 transitions. [2022-11-16 12:11:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:11:48,259 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2022-11-16 12:11:48,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:48,260 INFO L225 Difference]: With dead ends: 301 [2022-11-16 12:11:48,261 INFO L226 Difference]: Without dead ends: 267 [2022-11-16 12:11:48,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:11:48,262 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 82 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:48,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1273 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:11:48,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-16 12:11:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 234. [2022-11-16 12:11:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 221 states have (on average 1.2895927601809956) internal successors, (285), 222 states have internal predecessors, (285), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 12:11:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2022-11-16 12:11:48,348 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 54 [2022-11-16 12:11:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:48,349 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2022-11-16 12:11:48,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2022-11-16 12:11:48,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-16 12:11:48,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:48,350 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-16 12:11:48,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:48,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:48,550 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:48,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:48,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1409986660, now seen corresponding path program 1 times [2022-11-16 12:11:48,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:48,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197270462] [2022-11-16 12:11:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:48,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:48,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:48,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:48,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:11:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:48,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:11:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:11:48,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:48,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197270462] [2022-11-16 12:11:48,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197270462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:48,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735814437] [2022-11-16 12:11:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:48,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:48,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:48,807 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:48,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:11:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:48,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:11:48,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:11:49,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:11:49,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735814437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:49,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:49,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2022-11-16 12:11:49,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697146490] [2022-11-16 12:11:49,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:49,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:11:49,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:49,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:11:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:11:49,260 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 12:11:49,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:49,863 INFO L93 Difference]: Finished difference Result 324 states and 415 transitions. [2022-11-16 12:11:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:11:49,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 57 [2022-11-16 12:11:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:49,865 INFO L225 Difference]: With dead ends: 324 [2022-11-16 12:11:49,865 INFO L226 Difference]: Without dead ends: 258 [2022-11-16 12:11:49,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:11:49,867 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 159 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:49,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 519 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:11:49,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-16 12:11:49,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 224. [2022-11-16 12:11:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 212 states have (on average 1.2830188679245282) internal successors, (272), 213 states have internal predecessors, (272), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 287 transitions. [2022-11-16 12:11:49,973 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 287 transitions. Word has length 57 [2022-11-16 12:11:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:49,973 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 287 transitions. [2022-11-16 12:11:49,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 12:11:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 287 transitions. [2022-11-16 12:11:49,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:11:49,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:49,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:49,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:50,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 12:11:50,175 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:50,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1004480119, now seen corresponding path program 3 times [2022-11-16 12:11:50,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:50,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335609604] [2022-11-16 12:11:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:50,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:50,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:50,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:11:50,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:50,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335609604] [2022-11-16 12:11:50,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335609604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:50,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063226695] [2022-11-16 12:11:50,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:11:50,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:50,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:50,783 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:50,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:11:50,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:11:50,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:50,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:11:50,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:11:51,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:11:51,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063226695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:51,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:51,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-11-16 12:11:51,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020842611] [2022-11-16 12:11:51,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:51,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:11:51,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:51,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:11:51,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:11:51,667 INFO L87 Difference]: Start difference. First operand 224 states and 287 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:56,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:56,397 INFO L93 Difference]: Finished difference Result 1047 states and 1365 transitions. [2022-11-16 12:11:56,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-16 12:11:56,397 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-11-16 12:11:56,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:56,400 INFO L225 Difference]: With dead ends: 1047 [2022-11-16 12:11:56,401 INFO L226 Difference]: Without dead ends: 890 [2022-11-16 12:11:56,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1157, Invalid=7399, Unknown=0, NotChecked=0, Total=8556 [2022-11-16 12:11:56,404 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 1793 mSDsluCounter, 2162 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:56,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1793 Valid, 2369 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 12:11:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-11-16 12:11:56,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 209. [2022-11-16 12:11:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 197 states have (on average 1.284263959390863) internal successors, (253), 198 states have internal predecessors, (253), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 12:11:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 268 transitions. [2022-11-16 12:11:56,531 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 268 transitions. Word has length 55 [2022-11-16 12:11:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:56,532 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 268 transitions. [2022-11-16 12:11:56,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:56,532 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 268 transitions. [2022-11-16 12:11:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 12:11:56,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:56,533 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:56,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:56,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:56,733 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:56,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:56,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1373602884, now seen corresponding path program 1 times [2022-11-16 12:11:56,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:56,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263734521] [2022-11-16 12:11:56,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:56,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:57,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:11:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:57,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:11:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:57,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:11:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:57,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:11:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:11:57,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:57,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263734521] [2022-11-16 12:11:57,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263734521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:57,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818679798] [2022-11-16 12:11:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:57,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:57,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:57,651 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:57,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 12:11:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:57,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:11:57,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:11:58,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:11:58,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818679798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:58,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:58,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 8] total 31 [2022-11-16 12:11:58,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218596799] [2022-11-16 12:11:58,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:58,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:11:58,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:58,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:11:58,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:11:58,407 INFO L87 Difference]: Start difference. First operand 209 states and 268 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-16 12:12:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:03,008 INFO L93 Difference]: Finished difference Result 418 states and 535 transitions. [2022-11-16 12:12:03,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 12:12:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-11-16 12:12:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:03,011 INFO L225 Difference]: With dead ends: 418 [2022-11-16 12:12:03,011 INFO L226 Difference]: Without dead ends: 311 [2022-11-16 12:12:03,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=949, Invalid=4453, Unknown=0, NotChecked=0, Total=5402 [2022-11-16 12:12:03,013 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 862 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:03,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 936 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 12:12:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-16 12:12:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 229. [2022-11-16 12:12:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 214 states have (on average 1.2523364485981308) internal successors, (268), 215 states have internal predecessors, (268), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:12:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 289 transitions. [2022-11-16 12:12:03,133 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 289 transitions. Word has length 59 [2022-11-16 12:12:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:03,134 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 289 transitions. [2022-11-16 12:12:03,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-16 12:12:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 289 transitions. [2022-11-16 12:12:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-16 12:12:03,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:03,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:12:03,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:03,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:12:03,337 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:12:03,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:03,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1737992177, now seen corresponding path program 4 times [2022-11-16 12:12:03,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:12:03,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201359154] [2022-11-16 12:12:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:12:03,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:12:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:04,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:12:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:04,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:12:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:12:04,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:12:04,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201359154] [2022-11-16 12:12:04,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201359154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:12:04,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464453257] [2022-11-16 12:12:04,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:12:04,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:12:04,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:12:04,868 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:12:04,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 12:12:05,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:12:05,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:12:05,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 12:12:05,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:05,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:12:05,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:12:05,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:12:05,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:12:05,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 39 [2022-11-16 12:12:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:12:05,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:12:06,504 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-11-16 12:12:06,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-11-16 12:12:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:12:07,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464453257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:12:07,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:12:07,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 40 [2022-11-16 12:12:07,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71224783] [2022-11-16 12:12:07,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:12:07,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 12:12:07,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:12:07,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 12:12:07,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:12:07,500 INFO L87 Difference]: Start difference. First operand 229 states and 289 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:12:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:10,802 INFO L93 Difference]: Finished difference Result 436 states and 558 transitions. [2022-11-16 12:12:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:12:10,803 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2022-11-16 12:12:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:10,804 INFO L225 Difference]: With dead ends: 436 [2022-11-16 12:12:10,804 INFO L226 Difference]: Without dead ends: 412 [2022-11-16 12:12:10,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=399, Invalid=3023, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 12:12:10,805 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 618 mSDsluCounter, 1732 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:10,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 1840 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 12:12:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-11-16 12:12:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 241. [2022-11-16 12:12:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 226 states have (on average 1.252212389380531) internal successors, (283), 227 states have internal predecessors, (283), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:12:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 304 transitions. [2022-11-16 12:12:10,948 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 304 transitions. Word has length 58 [2022-11-16 12:12:10,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:10,948 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 304 transitions. [2022-11-16 12:12:10,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:12:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 304 transitions. [2022-11-16 12:12:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-16 12:12:10,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:10,950 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:12:10,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:11,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:12:11,155 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:12:11,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:11,155 INFO L85 PathProgramCache]: Analyzing trace with hash 162150685, now seen corresponding path program 5 times [2022-11-16 12:12:11,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:12:11,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190155214] [2022-11-16 12:12:11,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:12:11,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:12:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:12,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:12:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:12,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:12:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:12:12,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:12:12,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190155214] [2022-11-16 12:12:12,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190155214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:12:12,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144298294] [2022-11-16 12:12:12,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:12:12,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:12:12,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:12:12,703 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:12:12,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 12:12:13,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:12:13,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:12:13,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-16 12:12:13,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:12:15,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:12:18,110 INFO L321 Elim1Store]: treesize reduction 73, result has 86.7 percent of original size [2022-11-16 12:12:18,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 496 [2022-11-16 12:13:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:13:39,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144298294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:39,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:13:39,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 25] total 56 [2022-11-16 12:13:39,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361451901] [2022-11-16 12:13:39,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:39,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 12:13:39,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:13:39,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 12:13:39,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2676, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 12:13:39,268 INFO L87 Difference]: Start difference. First operand 241 states and 304 transitions. Second operand has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 55 states have internal predecessors, (107), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:13:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:52,915 INFO L93 Difference]: Finished difference Result 611 states and 786 transitions. [2022-11-16 12:13:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-16 12:13:52,916 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 55 states have internal predecessors, (107), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2022-11-16 12:13:52,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:52,919 INFO L225 Difference]: With dead ends: 611 [2022-11-16 12:13:52,919 INFO L226 Difference]: Without dead ends: 504 [2022-11-16 12:13:52,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=2000, Invalid=12520, Unknown=0, NotChecked=0, Total=14520 [2022-11-16 12:13:52,922 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1027 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:52,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 1733 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-16 12:13:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-16 12:13:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 261. [2022-11-16 12:13:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 246 states have (on average 1.2520325203252032) internal successors, (308), 247 states have internal predecessors, (308), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:13:53,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 329 transitions. [2022-11-16 12:13:53,043 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 329 transitions. Word has length 58 [2022-11-16 12:13:53,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:53,044 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 329 transitions. [2022-11-16 12:13:53,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 55 states have internal predecessors, (107), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:13:53,044 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 329 transitions. [2022-11-16 12:13:53,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-16 12:13:53,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:53,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:13:53,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:13:53,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 12:13:53,246 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:13:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:53,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1550031143, now seen corresponding path program 6 times [2022-11-16 12:13:53,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:13:53,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203542355] [2022-11-16 12:13:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:53,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:13:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:54,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:13:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:54,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:13:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:13:54,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:13:54,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203542355] [2022-11-16 12:13:54,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203542355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:13:54,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954111668] [2022-11-16 12:13:54,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:13:54,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:13:54,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:13:54,576 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:13:54,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 12:13:54,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 12:13:54,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:54,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-16 12:13:54,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:55,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:55,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:55,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:13:55,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:13:55,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 39 [2022-11-16 12:13:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:13:55,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:56,179 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-11-16 12:13:56,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-11-16 12:13:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:13:57,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954111668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:57,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:13:57,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 41 [2022-11-16 12:13:57,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480181651] [2022-11-16 12:13:57,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:57,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 12:13:57,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:13:57,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 12:13:57,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:13:57,225 INFO L87 Difference]: Start difference. First operand 261 states and 329 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:14:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:01,271 INFO L93 Difference]: Finished difference Result 469 states and 598 transitions. [2022-11-16 12:14:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 12:14:01,272 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2022-11-16 12:14:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:01,273 INFO L225 Difference]: With dead ends: 469 [2022-11-16 12:14:01,274 INFO L226 Difference]: Without dead ends: 443 [2022-11-16 12:14:01,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=514, Invalid=3908, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 12:14:01,275 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 688 mSDsluCounter, 1860 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:01,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 1953 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 12:14:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-16 12:14:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 254. [2022-11-16 12:14:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.2510460251046025) internal successors, (299), 240 states have internal predecessors, (299), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:14:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 320 transitions. [2022-11-16 12:14:01,400 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 320 transitions. Word has length 58 [2022-11-16 12:14:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:01,400 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 320 transitions. [2022-11-16 12:14:01,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:14:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 320 transitions. [2022-11-16 12:14:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 12:14:01,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:01,401 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-16 12:14:01,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:01,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:01,606 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:01,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1948639156, now seen corresponding path program 2 times [2022-11-16 12:14:01,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:01,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352327028] [2022-11-16 12:14:01,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:01,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:02,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:02,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:14:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:02,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:14:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:02,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:14:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:14:02,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:02,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352327028] [2022-11-16 12:14:02,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352327028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:02,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465218728] [2022-11-16 12:14:02,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:14:02,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:02,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:02,391 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:02,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 12:14:02,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:14:02,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:02,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 12:14:02,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:02,760 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:14:02,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-11-16 12:14:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:14:02,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:02,985 INFO L321 Elim1Store]: treesize reduction 19, result has 80.0 percent of original size [2022-11-16 12:14:02,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 83 [2022-11-16 12:14:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:14:03,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465218728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:03,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:03,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 23 [2022-11-16 12:14:03,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406662967] [2022-11-16 12:14:03,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:03,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:14:03,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:14:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:14:03,266 INFO L87 Difference]: Start difference. First operand 254 states and 320 transitions. Second operand has 23 states, 20 states have (on average 4.05) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-16 12:14:04,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:04,172 INFO L93 Difference]: Finished difference Result 407 states and 517 transitions. [2022-11-16 12:14:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:14:04,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 4.05) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 62 [2022-11-16 12:14:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:04,174 INFO L225 Difference]: With dead ends: 407 [2022-11-16 12:14:04,175 INFO L226 Difference]: Without dead ends: 343 [2022-11-16 12:14:04,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:14:04,176 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 153 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:04,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 811 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:14:04,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-16 12:14:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 258. [2022-11-16 12:14:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 242 states have (on average 1.2396694214876034) internal successors, (300), 243 states have internal predecessors, (300), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:14:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 323 transitions. [2022-11-16 12:14:04,371 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 323 transitions. Word has length 62 [2022-11-16 12:14:04,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:04,371 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 323 transitions. [2022-11-16 12:14:04,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 4.05) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-16 12:14:04,372 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 323 transitions. [2022-11-16 12:14:04,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-16 12:14:04,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:04,373 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:04,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:04,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 12:14:04,587 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:04,588 INFO L85 PathProgramCache]: Analyzing trace with hash -158527231, now seen corresponding path program 2 times [2022-11-16 12:14:04,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:04,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934147261] [2022-11-16 12:14:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:04,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:04,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:04,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:14:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 12:14:04,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:04,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934147261] [2022-11-16 12:14:04,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934147261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:04,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337513787] [2022-11-16 12:14:04,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:14:04,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:04,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:04,857 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:04,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 12:14:05,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:14:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:05,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:14:05,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:14:05,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:14:05,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337513787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:05,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:05,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-11-16 12:14:05,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987304239] [2022-11-16 12:14:05,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:05,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:14:05,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:05,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:14:05,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:14:05,762 INFO L87 Difference]: Start difference. First operand 258 states and 323 transitions. Second operand has 31 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:14:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:11,257 INFO L93 Difference]: Finished difference Result 815 states and 1047 transitions. [2022-11-16 12:14:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-16 12:14:11,258 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2022-11-16 12:14:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:11,260 INFO L225 Difference]: With dead ends: 815 [2022-11-16 12:14:11,260 INFO L226 Difference]: Without dead ends: 608 [2022-11-16 12:14:11,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=949, Invalid=7423, Unknown=0, NotChecked=0, Total=8372 [2022-11-16 12:14:11,262 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 624 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:11,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1890 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 12:14:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-16 12:14:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 485. [2022-11-16 12:14:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 469 states have (on average 1.2537313432835822) internal successors, (588), 470 states have internal predecessors, (588), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:14:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 611 transitions. [2022-11-16 12:14:11,497 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 611 transitions. Word has length 60 [2022-11-16 12:14:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:11,497 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 611 transitions. [2022-11-16 12:14:11,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:14:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 611 transitions. [2022-11-16 12:14:11,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 12:14:11,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:11,499 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:11,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:11,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 12:14:11,705 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:11,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1380776590, now seen corresponding path program 1 times [2022-11-16 12:14:11,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:11,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908406013] [2022-11-16 12:14:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:11,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:12,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:12,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:14:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:12,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:14:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:12,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-16 12:14:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:14:12,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:12,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908406013] [2022-11-16 12:14:12,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908406013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:12,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497295078] [2022-11-16 12:14:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:12,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:12,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:12,698 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:12,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 12:14:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:12,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 12:14:12,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:13,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:14:13,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 10 [2022-11-16 12:14:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:14:13,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:14,208 INFO L321 Elim1Store]: treesize reduction 19, result has 81.0 percent of original size [2022-11-16 12:14:14,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 88 [2022-11-16 12:14:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:14:15,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497295078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:15,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:15,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16] total 39 [2022-11-16 12:14:15,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346683339] [2022-11-16 12:14:15,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:15,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 12:14:15,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:15,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 12:14:15,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 12:14:15,091 INFO L87 Difference]: Start difference. First operand 485 states and 611 transitions. Second operand has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 7 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-16 12:14:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:16,857 INFO L93 Difference]: Finished difference Result 700 states and 894 transitions. [2022-11-16 12:14:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:14:16,858 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 7 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 63 [2022-11-16 12:14:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:16,862 INFO L225 Difference]: With dead ends: 700 [2022-11-16 12:14:16,862 INFO L226 Difference]: Without dead ends: 698 [2022-11-16 12:14:16,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=278, Invalid=2074, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:14:16,863 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 168 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:16,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1043 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1028 Invalid, 0 Unknown, 109 Unchecked, 0.9s Time] [2022-11-16 12:14:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-16 12:14:17,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 512. [2022-11-16 12:14:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 490 states have (on average 1.2489795918367348) internal successors, (612), 492 states have internal predecessors, (612), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:14:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 643 transitions. [2022-11-16 12:14:17,100 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 643 transitions. Word has length 63 [2022-11-16 12:14:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:17,101 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 643 transitions. [2022-11-16 12:14:17,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 7 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-16 12:14:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 643 transitions. [2022-11-16 12:14:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 12:14:17,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:17,103 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:14:17,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:17,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:17,308 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:17,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2005256085, now seen corresponding path program 7 times [2022-11-16 12:14:17,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:17,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978503788] [2022-11-16 12:14:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:17,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:17,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:17,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:14:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:14:17,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:17,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978503788] [2022-11-16 12:14:17,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978503788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:17,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564074285] [2022-11-16 12:14:17,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:14:17,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:17,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:17,714 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:17,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 12:14:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:17,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 12:14:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:14:18,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:14:18,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564074285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:18,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:18,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 12] total 28 [2022-11-16 12:14:18,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912592564] [2022-11-16 12:14:18,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:18,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:14:18,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:18,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:14:18,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:14:18,409 INFO L87 Difference]: Start difference. First operand 512 states and 643 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:14:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:20,959 INFO L93 Difference]: Finished difference Result 1358 states and 1733 transitions. [2022-11-16 12:14:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 12:14:20,959 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2022-11-16 12:14:20,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:20,965 INFO L225 Difference]: With dead ends: 1358 [2022-11-16 12:14:20,965 INFO L226 Difference]: Without dead ends: 1034 [2022-11-16 12:14:20,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 12:14:20,967 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 904 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:20,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 1966 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:14:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-11-16 12:14:21,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 596. [2022-11-16 12:14:21,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 574 states have (on average 1.2613240418118468) internal successors, (724), 576 states have internal predecessors, (724), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:14:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 755 transitions. [2022-11-16 12:14:21,323 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 755 transitions. Word has length 61 [2022-11-16 12:14:21,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:21,324 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 755 transitions. [2022-11-16 12:14:21,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:14:21,324 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 755 transitions. [2022-11-16 12:14:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 12:14:21,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:21,326 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:14:21,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:21,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 12:14:21,532 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:21,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1579304483, now seen corresponding path program 3 times [2022-11-16 12:14:21,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:21,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110605627] [2022-11-16 12:14:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:21,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:22,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:22,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:14:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:14:22,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:22,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110605627] [2022-11-16 12:14:22,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110605627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:22,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285736401] [2022-11-16 12:14:22,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:14:22,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:22,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:22,875 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:22,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 12:14:23,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:14:23,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 12:14:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:23,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:14:24,068 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-16 12:14:24,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2022-11-16 12:14:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:14:24,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 12:14:25,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285736401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:25,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:25,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 13] total 45 [2022-11-16 12:14:25,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633145784] [2022-11-16 12:14:25,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:25,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 12:14:25,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:25,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 12:14:25,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1765, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 12:14:25,069 INFO L87 Difference]: Start difference. First operand 596 states and 755 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:14:29,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:29,522 INFO L93 Difference]: Finished difference Result 941 states and 1214 transitions. [2022-11-16 12:14:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:14:29,522 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2022-11-16 12:14:29,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:29,524 INFO L225 Difference]: With dead ends: 941 [2022-11-16 12:14:29,524 INFO L226 Difference]: Without dead ends: 845 [2022-11-16 12:14:29,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=708, Invalid=5298, Unknown=0, NotChecked=0, Total=6006 [2022-11-16 12:14:29,525 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 932 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:29,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 1724 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 12:14:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-11-16 12:14:30,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 654. [2022-11-16 12:14:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 632 states have (on average 1.268987341772152) internal successors, (802), 634 states have internal predecessors, (802), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:14:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 833 transitions. [2022-11-16 12:14:30,014 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 833 transitions. Word has length 62 [2022-11-16 12:14:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:30,015 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 833 transitions. [2022-11-16 12:14:30,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:14:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 833 transitions. [2022-11-16 12:14:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 12:14:30,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:30,017 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-11-16 12:14:30,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:30,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 12:14:30,223 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:30,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:30,223 INFO L85 PathProgramCache]: Analyzing trace with hash -892086793, now seen corresponding path program 8 times [2022-11-16 12:14:30,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:30,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353834366] [2022-11-16 12:14:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:30,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:31,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:31,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:14:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:14:31,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:31,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353834366] [2022-11-16 12:14:31,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353834366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:31,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124303620] [2022-11-16 12:14:31,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:14:31,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:31,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:31,279 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:31,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 12:14:31,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:14:31,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:31,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:14:31,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 12:14:31,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 12:14:32,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124303620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:32,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:32,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 39 [2022-11-16 12:14:32,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103747874] [2022-11-16 12:14:32,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:32,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 12:14:32,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:32,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 12:14:32,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 12:14:32,177 INFO L87 Difference]: Start difference. First operand 654 states and 833 transitions. Second operand has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:14:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:56,241 INFO L93 Difference]: Finished difference Result 2717 states and 3509 transitions. [2022-11-16 12:14:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-11-16 12:14:56,242 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2022-11-16 12:14:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:56,252 INFO L225 Difference]: With dead ends: 2717 [2022-11-16 12:14:56,252 INFO L226 Difference]: Without dead ends: 2556 [2022-11-16 12:14:56,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10041 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=2804, Invalid=27646, Unknown=0, NotChecked=0, Total=30450 [2022-11-16 12:14:56,256 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 3643 mSDsluCounter, 5521 mSDsCounter, 0 mSdLazyCounter, 4984 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3647 SdHoareTripleChecker+Valid, 5806 SdHoareTripleChecker+Invalid, 5581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 4984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:56,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3647 Valid, 5806 Invalid, 5581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 4984 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-16 12:14:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-11-16 12:14:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 565. [2022-11-16 12:14:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 543 states have (on average 1.274401473296501) internal successors, (692), 545 states have internal predecessors, (692), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:14:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 723 transitions. [2022-11-16 12:14:56,647 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 723 transitions. Word has length 63 [2022-11-16 12:14:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:56,648 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 723 transitions. [2022-11-16 12:14:56,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:14:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 723 transitions. [2022-11-16 12:14:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 12:14:56,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:56,650 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:56,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:56,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 12:14:56,856 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:56,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2033592005, now seen corresponding path program 3 times [2022-11-16 12:14:56,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:56,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508466372] [2022-11-16 12:14:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:56,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:57,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:14:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 12:14:57,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:57,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508466372] [2022-11-16 12:14:57,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508466372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:57,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293346441] [2022-11-16 12:14:57,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:14:57,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:57,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:57,169 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:57,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 12:14:57,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:14:57,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:57,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:14:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-16 12:14:57,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-16 12:14:58,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293346441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:58,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:58,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2022-11-16 12:14:58,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285604178] [2022-11-16 12:14:58,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:58,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:14:58,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:58,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:14:58,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:14:58,521 INFO L87 Difference]: Start difference. First operand 565 states and 723 transitions. Second operand has 31 states, 30 states have (on average 3.4) internal successors, (102), 30 states have internal predecessors, (102), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:15:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:03,132 INFO L93 Difference]: Finished difference Result 730 states and 933 transitions. [2022-11-16 12:15:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 12:15:03,132 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.4) internal successors, (102), 30 states have internal predecessors, (102), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-11-16 12:15:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:03,134 INFO L225 Difference]: With dead ends: 730 [2022-11-16 12:15:03,135 INFO L226 Difference]: Without dead ends: 684 [2022-11-16 12:15:03,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=717, Invalid=4833, Unknown=0, NotChecked=0, Total=5550 [2022-11-16 12:15:03,136 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1390 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:03,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1390 Valid, 1121 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 12:15:03,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-11-16 12:15:03,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 573. [2022-11-16 12:15:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 551 states have (on average 1.2722323049001816) internal successors, (701), 553 states have internal predecessors, (701), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:15:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 732 transitions. [2022-11-16 12:15:03,560 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 732 transitions. Word has length 67 [2022-11-16 12:15:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:03,561 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 732 transitions. [2022-11-16 12:15:03,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.4) internal successors, (102), 30 states have internal predecessors, (102), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:15:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 732 transitions. [2022-11-16 12:15:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 12:15:03,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:03,563 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-11-16 12:15:03,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:03,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:03,769 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:03,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1736078367, now seen corresponding path program 9 times [2022-11-16 12:15:03,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:03,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911837051] [2022-11-16 12:15:03,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:03,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:05,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:05,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:15:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:15:05,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:05,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911837051] [2022-11-16 12:15:05,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911837051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:05,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443107642] [2022-11-16 12:15:05,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:15:05,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:05,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:05,379 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:05,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 12:15:08,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 12:15:08,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:15:08,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 12:15:08,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:09,778 INFO L321 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-11-16 12:15:09,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 74 [2022-11-16 12:15:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:15:09,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:11,592 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-11-16 12:15:11,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-11-16 12:15:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 12:15:13,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443107642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:13,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:13,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 22] total 68 [2022-11-16 12:15:13,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579969248] [2022-11-16 12:15:13,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:13,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-16 12:15:13,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:13,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-16 12:15:13,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=4226, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 12:15:13,280 INFO L87 Difference]: Start difference. First operand 573 states and 732 transitions. Second operand has 68 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 states have internal predecessors, (146), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:37,832 INFO L93 Difference]: Finished difference Result 2330 states and 3033 transitions. [2022-11-16 12:15:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-16 12:15:37,832 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 states have internal predecessors, (146), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2022-11-16 12:15:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:37,841 INFO L225 Difference]: With dead ends: 2330 [2022-11-16 12:15:37,841 INFO L226 Difference]: Without dead ends: 2272 [2022-11-16 12:15:37,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7386 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=2222, Invalid=24510, Unknown=0, NotChecked=0, Total=26732 [2022-11-16 12:15:37,843 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 2244 mSDsluCounter, 6896 mSDsCounter, 0 mSdLazyCounter, 10129 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2244 SdHoareTripleChecker+Valid, 7121 SdHoareTripleChecker+Invalid, 10589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 10129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:37,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2244 Valid, 7121 Invalid, 10589 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [460 Valid, 10129 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-11-16 12:15:37,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2022-11-16 12:15:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 597. [2022-11-16 12:15:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 575 states have (on average 1.271304347826087) internal successors, (731), 577 states have internal predecessors, (731), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:15:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 762 transitions. [2022-11-16 12:15:38,487 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 762 transitions. Word has length 68 [2022-11-16 12:15:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:38,487 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 762 transitions. [2022-11-16 12:15:38,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 states have internal predecessors, (146), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:38,488 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 762 transitions. [2022-11-16 12:15:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 12:15:38,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:38,490 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-11-16 12:15:38,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:38,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:38,696 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:38,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:38,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1104262353, now seen corresponding path program 10 times [2022-11-16 12:15:38,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:38,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155015401] [2022-11-16 12:15:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:38,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:40,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:40,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:15:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:15:40,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155015401] [2022-11-16 12:15:40,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155015401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709934799] [2022-11-16 12:15:40,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:15:40,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:40,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:40,327 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:40,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 12:15:40,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:15:40,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:15:40,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-16 12:15:40,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:15:41,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:15:41,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:15:41,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:15:41,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:15:41,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 31 [2022-11-16 12:15:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:15:41,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:42,569 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-11-16 12:15:42,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-11-16 12:15:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 12:15:44,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709934799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:44,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:44,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 17] total 52 [2022-11-16 12:15:44,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040505105] [2022-11-16 12:15:44,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:44,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:15:44,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:44,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:15:44,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2429, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 12:15:44,069 INFO L87 Difference]: Start difference. First operand 597 states and 762 transitions. Second operand has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 51 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:49,306 INFO L93 Difference]: Finished difference Result 1114 states and 1440 transitions. [2022-11-16 12:15:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 12:15:49,307 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 51 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2022-11-16 12:15:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:49,309 INFO L225 Difference]: With dead ends: 1114 [2022-11-16 12:15:49,309 INFO L226 Difference]: Without dead ends: 952 [2022-11-16 12:15:49,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 104 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=568, Invalid=5132, Unknown=0, NotChecked=0, Total=5700 [2022-11-16 12:15:49,310 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 666 mSDsluCounter, 1917 mSDsCounter, 0 mSdLazyCounter, 2988 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 2012 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:49,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 2012 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2988 Invalid, 0 Unknown, 18 Unchecked, 2.5s Time] [2022-11-16 12:15:49,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-11-16 12:15:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 617. [2022-11-16 12:15:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 595 states have (on average 1.2722689075630251) internal successors, (757), 597 states have internal predecessors, (757), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:15:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 788 transitions. [2022-11-16 12:15:49,836 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 788 transitions. Word has length 68 [2022-11-16 12:15:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:49,836 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 788 transitions. [2022-11-16 12:15:49,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 51 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 788 transitions. [2022-11-16 12:15:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 12:15:49,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:49,838 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-11-16 12:15:49,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:50,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-16 12:15:50,044 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:50,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:50,045 INFO L85 PathProgramCache]: Analyzing trace with hash -797080539, now seen corresponding path program 11 times [2022-11-16 12:15:50,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:50,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821050070] [2022-11-16 12:15:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:50,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:51,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:51,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:15:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:15:51,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:51,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821050070] [2022-11-16 12:15:51,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821050070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:51,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217715006] [2022-11-16 12:15:51,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:15:51,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:51,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:51,575 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:51,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 12:15:55,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-16 12:15:55,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:15:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-16 12:15:55,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:56,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:15:56,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:15:56,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:15:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:15:57,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 12:16:02,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217715006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:16:02,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:16:02,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 24] total 68 [2022-11-16 12:16:02,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712000952] [2022-11-16 12:16:02,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:02,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-16 12:16:02,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:02,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-16 12:16:02,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=4035, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 12:16:02,112 INFO L87 Difference]: Start difference. First operand 617 states and 788 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 66 states have internal predecessors, (144), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:16:56,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:56,423 INFO L93 Difference]: Finished difference Result 2294 states and 2992 transitions. [2022-11-16 12:16:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-11-16 12:16:56,423 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 66 states have internal predecessors, (144), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-11-16 12:16:56,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:56,427 INFO L225 Difference]: With dead ends: 2294 [2022-11-16 12:16:56,427 INFO L226 Difference]: Without dead ends: 2117 [2022-11-16 12:16:56,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9589 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=3395, Invalid=27757, Unknown=0, NotChecked=0, Total=31152 [2022-11-16 12:16:56,429 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 2633 mSDsluCounter, 3589 mSDsCounter, 0 mSdLazyCounter, 8174 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2645 SdHoareTripleChecker+Valid, 3746 SdHoareTripleChecker+Invalid, 8739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 8174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:56,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2645 Valid, 3746 Invalid, 8739 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [565 Valid, 8174 Invalid, 0 Unknown, 0 Unchecked, 26.0s Time] [2022-11-16 12:16:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2022-11-16 12:16:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 673. [2022-11-16 12:16:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 651 states have (on average 1.2795698924731183) internal successors, (833), 653 states have internal predecessors, (833), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:16:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 864 transitions. [2022-11-16 12:16:56,909 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 864 transitions. Word has length 68 [2022-11-16 12:16:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:56,909 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 864 transitions. [2022-11-16 12:16:56,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 66 states have internal predecessors, (144), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:16:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 864 transitions. [2022-11-16 12:16:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 12:16:56,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:56,911 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-11-16 12:16:56,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:57,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:57,118 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:57,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:57,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1785704929, now seen corresponding path program 12 times [2022-11-16 12:16:57,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:57,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334107090] [2022-11-16 12:16:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:57,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:58,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:16:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:58,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:16:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:16:58,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:58,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334107090] [2022-11-16 12:16:58,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334107090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:58,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636162475] [2022-11-16 12:16:58,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:16:58,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:58,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:58,612 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:58,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 12:16:58,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-16 12:16:58,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:16:58,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-16 12:16:58,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:59,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:59,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:59,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:59,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:16:59,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:16:59,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 31 [2022-11-16 12:16:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:16:59,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:00,434 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-11-16 12:17:00,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-11-16 12:17:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 12:17:01,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636162475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:01,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:01,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 16] total 44 [2022-11-16 12:17:01,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210000429] [2022-11-16 12:17:01,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:01,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 12:17:01,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:01,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 12:17:01,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1730, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:17:01,637 INFO L87 Difference]: Start difference. First operand 673 states and 864 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:17:06,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:06,212 INFO L93 Difference]: Finished difference Result 1061 states and 1377 transitions. [2022-11-16 12:17:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 12:17:06,213 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-11-16 12:17:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:06,216 INFO L225 Difference]: With dead ends: 1061 [2022-11-16 12:17:06,216 INFO L226 Difference]: Without dead ends: 1003 [2022-11-16 12:17:06,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 110 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=455, Invalid=4101, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 12:17:06,217 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 502 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 2604 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:06,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 1978 Invalid, 2681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2604 Invalid, 0 Unknown, 17 Unchecked, 2.2s Time] [2022-11-16 12:17:06,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-11-16 12:17:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 669. [2022-11-16 12:17:06,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 647 states have (on average 1.2812982998454405) internal successors, (829), 649 states have internal predecessors, (829), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:17:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 860 transitions. [2022-11-16 12:17:06,677 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 860 transitions. Word has length 68 [2022-11-16 12:17:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:06,678 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 860 transitions. [2022-11-16 12:17:06,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:17:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 860 transitions. [2022-11-16 12:17:06,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 12:17:06,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:06,680 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:06,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:06,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-16 12:17:06,886 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:06,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1009014033, now seen corresponding path program 2 times [2022-11-16 12:17:06,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:06,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740265935] [2022-11-16 12:17:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:06,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:06,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:17:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:06,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:17:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:06,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:17:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:06,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-16 12:17:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:06,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:17:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-16 12:17:06,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:06,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740265935] [2022-11-16 12:17:06,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740265935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:17:06,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:17:06,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:17:06,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287927469] [2022-11-16 12:17:06,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:17:06,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:17:06,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:06,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:17:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:17:06,983 INFO L87 Difference]: Start difference. First operand 669 states and 860 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 12:17:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:07,490 INFO L93 Difference]: Finished difference Result 711 states and 912 transitions. [2022-11-16 12:17:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:17:07,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-11-16 12:17:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:07,492 INFO L225 Difference]: With dead ends: 711 [2022-11-16 12:17:07,492 INFO L226 Difference]: Without dead ends: 681 [2022-11-16 12:17:07,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:17:07,493 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 8 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:07,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 229 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:17:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-11-16 12:17:07,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 677. [2022-11-16 12:17:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 655 states have (on average 1.2763358778625955) internal successors, (836), 657 states have internal predecessors, (836), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:17:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 867 transitions. [2022-11-16 12:17:07,949 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 867 transitions. Word has length 73 [2022-11-16 12:17:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:07,949 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 867 transitions. [2022-11-16 12:17:07,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 12:17:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 867 transitions. [2022-11-16 12:17:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 12:17:07,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:07,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:17:07,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-16 12:17:07,951 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:07,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1900032544, now seen corresponding path program 1 times [2022-11-16 12:17:07,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:07,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372579720] [2022-11-16 12:17:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:07,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:08,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:17:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:08,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:17:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:08,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:17:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:08,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-16 12:17:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:08,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-16 12:17:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:17:08,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:08,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372579720] [2022-11-16 12:17:08,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372579720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:08,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952581448] [2022-11-16 12:17:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:08,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:08,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:08,243 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:08,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 12:17:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:08,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:17:08,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:17:08,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:17:08,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952581448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:08,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:08,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-11-16 12:17:08,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067223790] [2022-11-16 12:17:08,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:08,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:17:08,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:08,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:17:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:17:08,825 INFO L87 Difference]: Start difference. First operand 677 states and 867 transitions. Second operand has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-16 12:17:09,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:09,655 INFO L93 Difference]: Finished difference Result 690 states and 878 transitions. [2022-11-16 12:17:09,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:17:09,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 74 [2022-11-16 12:17:09,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:09,658 INFO L225 Difference]: With dead ends: 690 [2022-11-16 12:17:09,659 INFO L226 Difference]: Without dead ends: 630 [2022-11-16 12:17:09,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:17:09,660 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 79 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:09,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 647 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:17:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-11-16 12:17:10,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 630. [2022-11-16 12:17:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 613 states have (on average 1.2903752039151712) internal successors, (791), 614 states have internal predecessors, (791), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:17:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 812 transitions. [2022-11-16 12:17:10,117 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 812 transitions. Word has length 74 [2022-11-16 12:17:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:10,117 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 812 transitions. [2022-11-16 12:17:10,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-16 12:17:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 812 transitions. [2022-11-16 12:17:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 12:17:10,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:10,119 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:10,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:10,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-16 12:17:10,319 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1078383189, now seen corresponding path program 2 times [2022-11-16 12:17:10,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:10,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051499050] [2022-11-16 12:17:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:10,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:10,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:17:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:10,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:17:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:10,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-16 12:17:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:10,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 12:17:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:10,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-16 12:17:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-16 12:17:10,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:10,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051499050] [2022-11-16 12:17:10,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051499050] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:10,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778095579] [2022-11-16 12:17:10,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:17:10,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:10,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:10,599 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:10,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-16 12:17:10,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:17:10,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:17:10,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:17:10,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-16 12:17:11,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 12:17:11,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778095579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:11,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:11,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 10] total 25 [2022-11-16 12:17:11,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136740980] [2022-11-16 12:17:11,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:11,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:17:11,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:11,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:17:11,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:17:11,573 INFO L87 Difference]: Start difference. First operand 630 states and 812 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-16 12:17:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:13,912 INFO L93 Difference]: Finished difference Result 885 states and 1136 transitions. [2022-11-16 12:17:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 12:17:13,912 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 74 [2022-11-16 12:17:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:13,915 INFO L225 Difference]: With dead ends: 885 [2022-11-16 12:17:13,915 INFO L226 Difference]: Without dead ends: 816 [2022-11-16 12:17:13,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 12:17:13,916 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 362 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:13,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 925 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:17:13,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-11-16 12:17:14,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 632. [2022-11-16 12:17:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 615 states have (on average 1.273170731707317) internal successors, (783), 616 states have internal predecessors, (783), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:17:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 804 transitions. [2022-11-16 12:17:14,325 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 804 transitions. Word has length 74 [2022-11-16 12:17:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:14,325 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 804 transitions. [2022-11-16 12:17:14,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-16 12:17:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 804 transitions. [2022-11-16 12:17:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 12:17:14,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:14,326 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-11-16 12:17:14,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:14,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-16 12:17:14,527 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:14,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash 894264333, now seen corresponding path program 13 times [2022-11-16 12:17:14,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:14,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049880864] [2022-11-16 12:17:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:14,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:15,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:17:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:15,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:17:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 12:17:15,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:15,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049880864] [2022-11-16 12:17:15,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049880864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:15,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562359642] [2022-11-16 12:17:15,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:17:15,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:15,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:15,035 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:15,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 12:17:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:15,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 12:17:15,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 12:17:15,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 12:17:15,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562359642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:15,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:15,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14] total 33 [2022-11-16 12:17:15,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407451706] [2022-11-16 12:17:15,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:15,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:17:15,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:15,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:17:15,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:17:15,994 INFO L87 Difference]: Start difference. First operand 632 states and 804 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:17:20,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:20,519 INFO L93 Difference]: Finished difference Result 2077 states and 2663 transitions. [2022-11-16 12:17:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 12:17:20,520 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2022-11-16 12:17:20,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:20,527 INFO L225 Difference]: With dead ends: 2077 [2022-11-16 12:17:20,527 INFO L226 Difference]: Without dead ends: 1721 [2022-11-16 12:17:20,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=524, Invalid=3636, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 12:17:20,530 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 2143 mSDsluCounter, 2284 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2147 SdHoareTripleChecker+Valid, 2448 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:20,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2147 Valid, 2448 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 12:17:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-11-16 12:17:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 706. [2022-11-16 12:17:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 689 states have (on average 1.2888243831640058) internal successors, (888), 690 states have internal predecessors, (888), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:17:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 909 transitions. [2022-11-16 12:17:20,994 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 909 transitions. Word has length 71 [2022-11-16 12:17:20,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:20,995 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 909 transitions. [2022-11-16 12:17:20,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:17:20,995 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 909 transitions. [2022-11-16 12:17:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 12:17:20,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:20,996 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 3, 3, 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] [2022-11-16 12:17:21,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:21,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-16 12:17:21,196 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:21,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:21,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1854811415, now seen corresponding path program 1 times [2022-11-16 12:17:21,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:21,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778893132] [2022-11-16 12:17:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:21,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:21,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:17:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:21,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:17:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 12:17:21,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:21,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778893132] [2022-11-16 12:17:21,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778893132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:21,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921767376] [2022-11-16 12:17:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:21,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:21,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:21,440 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:21,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-16 12:17:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:21,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:17:21,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 40 proven. 42 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 12:17:21,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 40 proven. 21 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 12:17:22,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921767376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:22,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:22,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 33 [2022-11-16 12:17:22,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352279361] [2022-11-16 12:17:22,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:22,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:17:22,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:22,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:17:22,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:17:22,224 INFO L87 Difference]: Start difference. First operand 706 states and 909 transitions. Second operand has 33 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:17:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:24,413 INFO L93 Difference]: Finished difference Result 1007 states and 1276 transitions. [2022-11-16 12:17:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:17:24,414 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2022-11-16 12:17:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:24,417 INFO L225 Difference]: With dead ends: 1007 [2022-11-16 12:17:24,417 INFO L226 Difference]: Without dead ends: 812 [2022-11-16 12:17:24,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 12:17:24,418 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 136 mSDsluCounter, 1870 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:24,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1950 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:17:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-11-16 12:17:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 675. [2022-11-16 12:17:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 658 states have (on average 1.2872340425531914) internal successors, (847), 659 states have internal predecessors, (847), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:17:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 868 transitions. [2022-11-16 12:17:24,894 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 868 transitions. Word has length 71 [2022-11-16 12:17:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:24,894 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 868 transitions. [2022-11-16 12:17:24,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:17:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 868 transitions. [2022-11-16 12:17:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 12:17:24,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:24,895 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:24,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:25,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-16 12:17:25,096 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:25,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1292302041, now seen corresponding path program 4 times [2022-11-16 12:17:25,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:25,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402534060] [2022-11-16 12:17:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:25,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:26,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:17:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:26,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:17:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 12:17:26,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:26,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402534060] [2022-11-16 12:17:26,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402534060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:26,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000575129] [2022-11-16 12:17:26,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:17:26,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:26,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:26,130 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:26,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-16 12:17:26,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:17:26,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:17:26,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-16 12:17:26,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:26,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:17:28,281 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-16 12:17:28,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2022-11-16 12:17:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 74 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:17:28,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 12:17:29,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000575129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:29,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:29,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 16] total 56 [2022-11-16 12:17:29,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878362851] [2022-11-16 12:17:29,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:29,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 12:17:29,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:29,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 12:17:29,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2724, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 12:17:29,733 INFO L87 Difference]: Start difference. First operand 675 states and 868 transitions. Second operand has 56 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 54 states have internal predecessors, (146), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:17:40,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:40,489 INFO L93 Difference]: Finished difference Result 1771 states and 2328 transitions. [2022-11-16 12:17:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 12:17:40,490 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 54 states have internal predecessors, (146), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 72 [2022-11-16 12:17:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:40,494 INFO L225 Difference]: With dead ends: 1771 [2022-11-16 12:17:40,495 INFO L226 Difference]: Without dead ends: 1646 [2022-11-16 12:17:40,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2989 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1480, Invalid=10952, Unknown=0, NotChecked=0, Total=12432 [2022-11-16 12:17:40,497 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 1300 mSDsluCounter, 3135 mSDsCounter, 0 mSdLazyCounter, 4994 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 3290 SdHoareTripleChecker+Invalid, 5354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 4994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:40,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1301 Valid, 3290 Invalid, 5354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 4994 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-16 12:17:40,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-11-16 12:17:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 744. [2022-11-16 12:17:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 727 states have (on average 1.2943603851444292) internal successors, (941), 728 states have internal predecessors, (941), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:17:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 962 transitions. [2022-11-16 12:17:41,070 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 962 transitions. Word has length 72 [2022-11-16 12:17:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:41,070 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 962 transitions. [2022-11-16 12:17:41,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 54 states have internal predecessors, (146), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:17:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 962 transitions. [2022-11-16 12:17:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 12:17:41,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:41,073 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 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] [2022-11-16 12:17:41,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:41,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:41,283 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:41,284 INFO L85 PathProgramCache]: Analyzing trace with hash 121073647, now seen corresponding path program 14 times [2022-11-16 12:17:41,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:41,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146809092] [2022-11-16 12:17:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:41,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:41,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:17:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:41,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:17:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-16 12:17:41,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:41,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146809092] [2022-11-16 12:17:41,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146809092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:41,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880574476] [2022-11-16 12:17:41,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:17:41,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:41,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:41,869 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:41,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-16 12:17:42,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:17:42,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:17:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 12:17:42,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-16 12:17:42,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-16 12:17:42,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880574476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:42,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:42,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-11-16 12:17:42,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166908985] [2022-11-16 12:17:42,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:42,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 12:17:42,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:42,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 12:17:42,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:17:42,851 INFO L87 Difference]: Start difference. First operand 744 states and 962 transitions. Second operand has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 36 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:17:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:45,492 INFO L93 Difference]: Finished difference Result 1160 states and 1483 transitions. [2022-11-16 12:17:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:17:45,492 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 36 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 73 [2022-11-16 12:17:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:45,495 INFO L225 Difference]: With dead ends: 1160 [2022-11-16 12:17:45,495 INFO L226 Difference]: Without dead ends: 954 [2022-11-16 12:17:45,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=351, Invalid=2099, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 12:17:45,497 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 985 mSDsluCounter, 1977 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 2113 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:45,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [985 Valid, 2113 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:17:45,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-11-16 12:17:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 608. [2022-11-16 12:17:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 591 states have (on average 1.2791878172588833) internal successors, (756), 592 states have internal predecessors, (756), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:17:45,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 777 transitions. [2022-11-16 12:17:45,953 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 777 transitions. Word has length 73 [2022-11-16 12:17:45,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:45,953 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 777 transitions. [2022-11-16 12:17:45,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 36 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:17:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 777 transitions. [2022-11-16 12:17:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 12:17:45,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:45,954 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:45,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:46,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:46,154 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:46,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:46,155 INFO L85 PathProgramCache]: Analyzing trace with hash -306423327, now seen corresponding path program 1 times [2022-11-16 12:17:46,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:46,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859320366] [2022-11-16 12:17:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:46,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:47,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:17:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:47,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:17:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:47,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-16 12:17:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:47,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-16 12:17:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:47,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:17:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:17:47,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:47,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859320366] [2022-11-16 12:17:47,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859320366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:47,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859624140] [2022-11-16 12:17:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:47,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:47,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:47,315 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:47,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-16 12:17:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:47,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 12:17:47,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:47,970 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:17:47,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-16 12:17:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:17:47,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:48,221 INFO L321 Elim1Store]: treesize reduction 19, result has 81.2 percent of original size [2022-11-16 12:17:48,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 89 [2022-11-16 12:17:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-16 12:17:48,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859624140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:48,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:48,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 32 [2022-11-16 12:17:48,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170405741] [2022-11-16 12:17:48,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:48,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 12:17:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 12:17:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:17:48,710 INFO L87 Difference]: Start difference. First operand 608 states and 777 transitions. Second operand has 32 states, 30 states have (on average 3.6) internal successors, (108), 32 states have internal predecessors, (108), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-16 12:17:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:50,516 INFO L93 Difference]: Finished difference Result 825 states and 1058 transitions. [2022-11-16 12:17:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:17:50,517 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.6) internal successors, (108), 32 states have internal predecessors, (108), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 78 [2022-11-16 12:17:50,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:50,519 INFO L225 Difference]: With dead ends: 825 [2022-11-16 12:17:50,519 INFO L226 Difference]: Without dead ends: 796 [2022-11-16 12:17:50,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:17:50,520 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 288 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:50,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 981 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:17:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-11-16 12:17:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 622. [2022-11-16 12:17:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 603 states have (on average 1.2736318407960199) internal successors, (768), 604 states have internal predecessors, (768), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 12:17:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 793 transitions. [2022-11-16 12:17:50,999 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 793 transitions. Word has length 78 [2022-11-16 12:17:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:50,999 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 793 transitions. [2022-11-16 12:17:50,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.6) internal successors, (108), 32 states have internal predecessors, (108), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-16 12:17:50,999 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 793 transitions. [2022-11-16 12:17:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 12:17:51,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:51,001 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2022-11-16 12:17:51,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:51,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-16 12:17:51,206 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:51,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2061405423, now seen corresponding path program 15 times [2022-11-16 12:17:51,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:51,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116319059] [2022-11-16 12:17:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:51,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:52,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:17:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:52,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:17:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 12:17:52,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:52,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116319059] [2022-11-16 12:17:52,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116319059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:52,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566778650] [2022-11-16 12:17:52,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:17:52,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:52,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:52,183 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:52,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-16 12:17:54,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 12:17:54,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:17:54,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:17:54,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 12:17:55,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 12:17:55,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566778650] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:55,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:55,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 15] total 47 [2022-11-16 12:17:55,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648380911] [2022-11-16 12:17:55,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:55,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 12:17:55,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:55,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 12:17:55,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 12:17:55,901 INFO L87 Difference]: Start difference. First operand 622 states and 793 transitions. Second operand has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:18:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:15,029 INFO L93 Difference]: Finished difference Result 3434 states and 4399 transitions. [2022-11-16 12:18:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-11-16 12:18:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 75 [2022-11-16 12:18:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:15,036 INFO L225 Difference]: With dead ends: 3434 [2022-11-16 12:18:15,036 INFO L226 Difference]: Without dead ends: 2914 [2022-11-16 12:18:15,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9533 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=2985, Invalid=29595, Unknown=0, NotChecked=0, Total=32580 [2022-11-16 12:18:15,039 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 4218 mSDsluCounter, 8407 mSDsCounter, 0 mSdLazyCounter, 7628 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4218 SdHoareTripleChecker+Valid, 8757 SdHoareTripleChecker+Invalid, 7982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 7628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:15,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4218 Valid, 8757 Invalid, 7982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 7628 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-16 12:18:15,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2022-11-16 12:18:15,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 590. [2022-11-16 12:18:15,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 571 states have (on average 1.2626970227670753) internal successors, (721), 572 states have internal predecessors, (721), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 12:18:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 746 transitions. [2022-11-16 12:18:15,606 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 746 transitions. Word has length 75 [2022-11-16 12:18:15,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:15,606 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 746 transitions. [2022-11-16 12:18:15,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:18:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 746 transitions. [2022-11-16 12:18:15,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 12:18:15,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:15,608 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:18:15,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:15,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-16 12:18:15,808 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:15,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:15,808 INFO L85 PathProgramCache]: Analyzing trace with hash -75104113, now seen corresponding path program 1 times [2022-11-16 12:18:15,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:15,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429124075] [2022-11-16 12:18:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:15,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:17,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:17,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:18:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:17,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:18:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:17,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:18:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:17,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 12:18:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:18:17,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:17,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429124075] [2022-11-16 12:18:17,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429124075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:17,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304185547] [2022-11-16 12:18:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:17,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:17,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:17,014 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:17,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-16 12:18:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:17,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-16 12:18:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:17,617 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:18:17,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-11-16 12:18:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:18:17,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:17,916 INFO L321 Elim1Store]: treesize reduction 15, result has 84.2 percent of original size [2022-11-16 12:18:17,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 87 [2022-11-16 12:18:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-16 12:18:18,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304185547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:18,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:18,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 10] total 35 [2022-11-16 12:18:18,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099105102] [2022-11-16 12:18:18,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:18,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 12:18:18,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:18,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 12:18:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 12:18:18,225 INFO L87 Difference]: Start difference. First operand 590 states and 746 transitions. Second operand has 35 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 34 states have internal predecessors, (121), 9 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-16 12:18:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:21,097 INFO L93 Difference]: Finished difference Result 931 states and 1196 transitions. [2022-11-16 12:18:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:18:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 34 states have internal predecessors, (121), 9 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) Word has length 79 [2022-11-16 12:18:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:21,099 INFO L225 Difference]: With dead ends: 931 [2022-11-16 12:18:21,099 INFO L226 Difference]: Without dead ends: 899 [2022-11-16 12:18:21,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=291, Invalid=2361, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 12:18:21,101 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 398 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:21,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 1885 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1748 Invalid, 0 Unknown, 38 Unchecked, 1.2s Time] [2022-11-16 12:18:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-11-16 12:18:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 601. [2022-11-16 12:18:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 580 states have (on average 1.2603448275862068) internal successors, (731), 581 states have internal predecessors, (731), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 12:18:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 758 transitions. [2022-11-16 12:18:21,629 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 758 transitions. Word has length 79 [2022-11-16 12:18:21,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:21,629 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 758 transitions. [2022-11-16 12:18:21,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 34 states have internal predecessors, (121), 9 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-16 12:18:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 758 transitions. [2022-11-16 12:18:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 12:18:21,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:21,630 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:18:21,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:21,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:21,830 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:21,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:21,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1771822365, now seen corresponding path program 2 times [2022-11-16 12:18:21,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:21,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299537079] [2022-11-16 12:18:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:21,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:22,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:22,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:18:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:22,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:18:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:22,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:18:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:22,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 12:18:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:18:22,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:22,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299537079] [2022-11-16 12:18:22,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299537079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:22,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734075506] [2022-11-16 12:18:22,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:18:22,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:22,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:22,984 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:22,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-16 12:18:23,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:18:23,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:18:23,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-16 12:18:23,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:24,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:24,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-16 12:18:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 19 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:18:24,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:24,370 INFO L321 Elim1Store]: treesize reduction 19, result has 81.6 percent of original size [2022-11-16 12:18:24,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 91 [2022-11-16 12:18:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 12:18:25,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734075506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:25,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:25,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 15] total 40 [2022-11-16 12:18:25,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489747497] [2022-11-16 12:18:25,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:25,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 12:18:25,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:25,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 12:18:25,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:18:25,319 INFO L87 Difference]: Start difference. First operand 601 states and 758 transitions. Second operand has 40 states, 39 states have (on average 3.3076923076923075) internal successors, (129), 38 states have internal predecessors, (129), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-16 12:18:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:27,717 INFO L93 Difference]: Finished difference Result 1073 states and 1371 transitions. [2022-11-16 12:18:27,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:18:27,717 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.3076923076923075) internal successors, (129), 38 states have internal predecessors, (129), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 79 [2022-11-16 12:18:27,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:27,719 INFO L225 Difference]: With dead ends: 1073 [2022-11-16 12:18:27,719 INFO L226 Difference]: Without dead ends: 927 [2022-11-16 12:18:27,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 138 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 12:18:27,720 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 274 mSDsluCounter, 2097 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:27,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 2208 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1474 Invalid, 0 Unknown, 145 Unchecked, 1.0s Time] [2022-11-16 12:18:27,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-11-16 12:18:28,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 607. [2022-11-16 12:18:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 582 states have (on average 1.2491408934707904) internal successors, (727), 583 states have internal predecessors, (727), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:18:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 758 transitions. [2022-11-16 12:18:28,273 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 758 transitions. Word has length 79 [2022-11-16 12:18:28,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:28,274 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 758 transitions. [2022-11-16 12:18:28,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.3076923076923075) internal successors, (129), 38 states have internal predecessors, (129), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-16 12:18:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 758 transitions. [2022-11-16 12:18:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 12:18:28,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:28,275 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 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] [2022-11-16 12:18:28,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:28,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-16 12:18:28,476 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1089634329, now seen corresponding path program 4 times [2022-11-16 12:18:28,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:28,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900655132] [2022-11-16 12:18:28,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:28,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:28,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:28,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:18:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 12:18:28,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:28,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900655132] [2022-11-16 12:18:28,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900655132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:28,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557559663] [2022-11-16 12:18:28,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:18:28,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:28,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:28,775 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:28,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-16 12:18:28,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:18:28,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:18:28,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:18:28,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 65 proven. 38 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-16 12:18:29,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 65 proven. 38 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-16 12:18:29,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557559663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:29,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:29,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-11-16 12:18:29,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250536316] [2022-11-16 12:18:29,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:29,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 12:18:29,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 12:18:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 12:18:29,673 INFO L87 Difference]: Start difference. First operand 607 states and 758 transitions. Second operand has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:18:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:32,536 INFO L93 Difference]: Finished difference Result 1021 states and 1268 transitions. [2022-11-16 12:18:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 12:18:32,537 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 77 [2022-11-16 12:18:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:32,538 INFO L225 Difference]: With dead ends: 1021 [2022-11-16 12:18:32,538 INFO L226 Difference]: Without dead ends: 887 [2022-11-16 12:18:32,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=309, Invalid=2661, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 12:18:32,539 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 326 mSDsluCounter, 2401 mSDsCounter, 0 mSdLazyCounter, 1896 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:32,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 2515 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1896 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 12:18:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-11-16 12:18:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 647. [2022-11-16 12:18:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 622 states have (on average 1.2491961414790997) internal successors, (777), 623 states have internal predecessors, (777), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:18:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 808 transitions. [2022-11-16 12:18:33,129 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 808 transitions. Word has length 77 [2022-11-16 12:18:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:33,129 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 808 transitions. [2022-11-16 12:18:33,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:18:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 808 transitions. [2022-11-16 12:18:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 12:18:33,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:33,131 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-11-16 12:18:33,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:33,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:33,337 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:33,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1281507689, now seen corresponding path program 16 times [2022-11-16 12:18:33,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:33,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755326181] [2022-11-16 12:18:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:33,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:35,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:35,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:18:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 12:18:35,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:35,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755326181] [2022-11-16 12:18:35,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755326181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:35,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673343253] [2022-11-16 12:18:35,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:18:35,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:35,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:35,247 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:35,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-16 12:18:35,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:18:35,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:18:35,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-16 12:18:35,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:38,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:38,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-11-16 12:18:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 12 proven. 101 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:18:38,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:39,813 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-11-16 12:18:39,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-11-16 12:18:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 12:18:42,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673343253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:42,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:42,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31, 21] total 73 [2022-11-16 12:18:42,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933976216] [2022-11-16 12:18:42,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:42,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-16 12:18:42,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-16 12:18:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=4868, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 12:18:42,408 INFO L87 Difference]: Start difference. First operand 647 states and 808 transitions. Second operand has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 72 states have internal predecessors, (170), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:19:03,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:03,693 INFO L93 Difference]: Finished difference Result 1710 states and 2191 transitions. [2022-11-16 12:19:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-16 12:19:03,694 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 72 states have internal predecessors, (170), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2022-11-16 12:19:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:03,696 INFO L225 Difference]: With dead ends: 1710 [2022-11-16 12:19:03,696 INFO L226 Difference]: Without dead ends: 1670 [2022-11-16 12:19:03,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5293 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=1631, Invalid=18391, Unknown=0, NotChecked=0, Total=20022 [2022-11-16 12:19:03,698 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 1429 mSDsluCounter, 4495 mSDsCounter, 0 mSdLazyCounter, 8013 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 4660 SdHoareTripleChecker+Invalid, 8285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 8013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:03,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1437 Valid, 4660 Invalid, 8285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 8013 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-11-16 12:19:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-11-16 12:19:04,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 659. [2022-11-16 12:19:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 634 states have (on average 1.249211356466877) internal successors, (792), 635 states have internal predecessors, (792), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:19:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 823 transitions. [2022-11-16 12:19:04,341 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 823 transitions. Word has length 78 [2022-11-16 12:19:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:04,342 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 823 transitions. [2022-11-16 12:19:04,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 72 states have internal predecessors, (170), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:19:04,342 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 823 transitions. [2022-11-16 12:19:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 12:19:04,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:04,344 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-11-16 12:19:04,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-11-16 12:19:04,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:04,550 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:04,550 INFO L85 PathProgramCache]: Analyzing trace with hash -963092143, now seen corresponding path program 17 times [2022-11-16 12:19:04,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:04,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724710208] [2022-11-16 12:19:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:04,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:06,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:19:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:06,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:19:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 12:19:06,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:06,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724710208] [2022-11-16 12:19:06,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724710208] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:06,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146720706] [2022-11-16 12:19:06,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:19:06,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:06,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:06,355 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:06,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-16 12:19:23,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 12:19:23,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:19:23,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-16 12:19:23,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:23,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:19:24,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:24,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:19:24,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:24,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:19:24,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 39 [2022-11-16 12:19:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 12 proven. 102 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:19:24,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 12:19:26,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146720706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:19:26,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:19:26,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 34, 22] total 64 [2022-11-16 12:19:26,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108871002] [2022-11-16 12:19:26,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:26,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-16 12:19:26,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-16 12:19:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=3695, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 12:19:26,827 INFO L87 Difference]: Start difference. First operand 659 states and 823 transitions. Second operand has 64 states, 64 states have (on average 2.265625) internal successors, (145), 62 states have internal predecessors, (145), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:19:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:49,359 INFO L93 Difference]: Finished difference Result 2313 states and 2960 transitions. [2022-11-16 12:19:49,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-16 12:19:49,360 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.265625) internal successors, (145), 62 states have internal predecessors, (145), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2022-11-16 12:19:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:49,364 INFO L225 Difference]: With dead ends: 2313 [2022-11-16 12:19:49,364 INFO L226 Difference]: Without dead ends: 2273 [2022-11-16 12:19:49,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 115 SyntacticMatches, 7 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7002 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2215, Invalid=23867, Unknown=0, NotChecked=0, Total=26082 [2022-11-16 12:19:49,366 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 2610 mSDsluCounter, 7829 mSDsCounter, 0 mSdLazyCounter, 12170 mSolverCounterSat, 641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2610 SdHoareTripleChecker+Valid, 8127 SdHoareTripleChecker+Invalid, 12811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 12170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:49,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2610 Valid, 8127 Invalid, 12811 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [641 Valid, 12170 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-11-16 12:19:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2022-11-16 12:19:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 669. [2022-11-16 12:19:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 644 states have (on average 1.25) internal successors, (805), 645 states have internal predecessors, (805), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:19:50,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 836 transitions. [2022-11-16 12:19:50,037 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 836 transitions. Word has length 78 [2022-11-16 12:19:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:50,038 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 836 transitions. [2022-11-16 12:19:50,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.265625) internal successors, (145), 62 states have internal predecessors, (145), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:19:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 836 transitions. [2022-11-16 12:19:50,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 12:19:50,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:50,039 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-11-16 12:19:50,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:50,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-16 12:19:50,240 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash -871331223, now seen corresponding path program 18 times [2022-11-16 12:19:50,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:50,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758920453] [2022-11-16 12:19:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:50,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:51,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:19:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:51,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:19:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 12:19:51,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:51,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758920453] [2022-11-16 12:19:51,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758920453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:51,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030331709] [2022-11-16 12:19:51,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:19:51,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:51,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:51,983 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:51,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-16 12:19:55,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-16 12:19:55,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:19:55,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 12:19:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:57,255 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-16 12:19:57,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2022-11-16 12:19:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 104 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:19:57,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:58,753 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-11-16 12:19:58,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-11-16 12:20:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 12:20:00,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030331709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:20:00,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:20:00,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31, 19] total 70 [2022-11-16 12:20:00,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718019890] [2022-11-16 12:20:00,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:20:00,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-16 12:20:00,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-16 12:20:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=4531, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 12:20:00,683 INFO L87 Difference]: Start difference. First operand 669 states and 836 transitions. Second operand has 70 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 69 states have internal predecessors, (166), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:20:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:19,102 INFO L93 Difference]: Finished difference Result 1736 states and 2211 transitions. [2022-11-16 12:20:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-16 12:20:19,102 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 69 states have internal predecessors, (166), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 78 [2022-11-16 12:20:19,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:19,105 INFO L225 Difference]: With dead ends: 1736 [2022-11-16 12:20:19,106 INFO L226 Difference]: Without dead ends: 1592 [2022-11-16 12:20:19,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3964 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1167, Invalid=14583, Unknown=0, NotChecked=0, Total=15750 [2022-11-16 12:20:19,108 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 1570 mSDsluCounter, 5889 mSDsCounter, 0 mSdLazyCounter, 7792 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 6080 SdHoareTripleChecker+Invalid, 8055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 7792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:19,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1570 Valid, 6080 Invalid, 8055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 7792 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-16 12:20:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-11-16 12:20:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 679. [2022-11-16 12:20:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 654 states have (on average 1.2507645259938838) internal successors, (818), 655 states have internal predecessors, (818), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:20:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 849 transitions. [2022-11-16 12:20:19,774 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 849 transitions. Word has length 78 [2022-11-16 12:20:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:19,774 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 849 transitions. [2022-11-16 12:20:19,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 69 states have internal predecessors, (166), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:20:19,774 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 849 transitions. [2022-11-16 12:20:19,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 12:20:19,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:19,776 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-11-16 12:20:19,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:19,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-16 12:20:19,977 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:19,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:19,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1748727147, now seen corresponding path program 19 times [2022-11-16 12:20:19,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:19,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837381397] [2022-11-16 12:20:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:19,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:21,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:20:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:21,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:20:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 12:20:21,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837381397] [2022-11-16 12:20:21,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837381397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:20:21,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549402480] [2022-11-16 12:20:21,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:20:21,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:21,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:21,598 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:21,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-16 12:20:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:21,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 12:20:21,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:23,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:20:23,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:20:23,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:20:24,005 INFO L321 Elim1Store]: treesize reduction 32, result has 17.9 percent of original size [2022-11-16 12:20:24,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 41 [2022-11-16 12:20:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 24 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:20:24,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:20:25,029 INFO L321 Elim1Store]: treesize reduction 19, result has 81.2 percent of original size [2022-11-16 12:20:25,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 89 [2022-11-16 12:20:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-16 12:20:26,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549402480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:20:26,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:20:26,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 13] total 57 [2022-11-16 12:20:26,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924150047] [2022-11-16 12:20:26,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:20:26,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-16 12:20:26,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:26,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-16 12:20:26,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 12:20:26,071 INFO L87 Difference]: Start difference. First operand 679 states and 849 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:20:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:41,598 INFO L93 Difference]: Finished difference Result 1941 states and 2476 transitions. [2022-11-16 12:20:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-16 12:20:41,598 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2022-11-16 12:20:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:41,601 INFO L225 Difference]: With dead ends: 1941 [2022-11-16 12:20:41,601 INFO L226 Difference]: Without dead ends: 1791 [2022-11-16 12:20:41,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4171 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1413, Invalid=15357, Unknown=0, NotChecked=0, Total=16770 [2022-11-16 12:20:41,604 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 1528 mSDsluCounter, 4296 mSDsCounter, 0 mSdLazyCounter, 6979 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 4471 SdHoareTripleChecker+Invalid, 7194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 6979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:41,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1532 Valid, 4471 Invalid, 7194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 6979 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-16 12:20:41,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2022-11-16 12:20:42,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 688. [2022-11-16 12:20:42,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 663 states have (on average 1.2458521870286576) internal successors, (826), 664 states have internal predecessors, (826), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:20:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 857 transitions. [2022-11-16 12:20:42,673 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 857 transitions. Word has length 78 [2022-11-16 12:20:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:42,674 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 857 transitions. [2022-11-16 12:20:42,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:20:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 857 transitions. [2022-11-16 12:20:42,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 12:20:42,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:42,676 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-11-16 12:20:42,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:42,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:42,882 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:42,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:42,882 INFO L85 PathProgramCache]: Analyzing trace with hash 834058321, now seen corresponding path program 20 times [2022-11-16 12:20:42,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:42,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137724829] [2022-11-16 12:20:42,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:42,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:44,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:20:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:44,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:20:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 12:20:44,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:44,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137724829] [2022-11-16 12:20:44,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137724829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:20:44,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743652706] [2022-11-16 12:20:44,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:20:44,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:44,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:44,867 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:44,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-16 12:20:45,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:20:45,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:20:45,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-16 12:20:45,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:48,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:20:48,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-11-16 12:20:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 12 proven. 101 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:20:48,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:20:49,503 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-11-16 12:20:49,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-11-16 12:20:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 12:20:51,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743652706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:20:51,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:20:51,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 32, 20] total 73 [2022-11-16 12:20:51,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647421405] [2022-11-16 12:20:51,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:20:51,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-16 12:20:51,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:51,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-16 12:20:51,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=4850, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 12:20:51,726 INFO L87 Difference]: Start difference. First operand 688 states and 857 transitions. Second operand has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 72 states have internal predecessors, (170), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:21:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:06,966 INFO L93 Difference]: Finished difference Result 1854 states and 2343 transitions. [2022-11-16 12:21:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-16 12:21:06,967 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 72 states have internal predecessors, (170), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2022-11-16 12:21:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:06,971 INFO L225 Difference]: With dead ends: 1854 [2022-11-16 12:21:06,971 INFO L226 Difference]: Without dead ends: 1687 [2022-11-16 12:21:06,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4406 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1469, Invalid=14533, Unknown=0, NotChecked=0, Total=16002 [2022-11-16 12:21:06,973 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 2241 mSDsluCounter, 4346 mSDsCounter, 0 mSdLazyCounter, 6762 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2253 SdHoareTripleChecker+Valid, 4517 SdHoareTripleChecker+Invalid, 7104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 6762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:06,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2253 Valid, 4517 Invalid, 7104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 6762 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-16 12:21:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2022-11-16 12:21:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 694. [2022-11-16 12:21:08,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 669 states have (on average 1.2436472346786247) internal successors, (832), 670 states have internal predecessors, (832), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:21:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 863 transitions. [2022-11-16 12:21:08,006 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 863 transitions. Word has length 78 [2022-11-16 12:21:08,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:08,006 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 863 transitions. [2022-11-16 12:21:08,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 72 states have internal predecessors, (170), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:21:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 863 transitions. [2022-11-16 12:21:08,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 12:21:08,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:08,008 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2022-11-16 12:21:08,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-16 12:21:08,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:08,209 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:21:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1562188599, now seen corresponding path program 5 times [2022-11-16 12:21:08,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:08,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523120900] [2022-11-16 12:21:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:08,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:08,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:21:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:08,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:21:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-16 12:21:08,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:08,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523120900] [2022-11-16 12:21:08,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523120900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:08,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451802318] [2022-11-16 12:21:08,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:21:08,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:08,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:08,615 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:08,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-16 12:21:35,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 12:21:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:21:35,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-16 12:21:35,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:36,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:21:37,848 INFO L321 Elim1Store]: treesize reduction 38, result has 47.9 percent of original size [2022-11-16 12:21:37,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 70 [2022-11-16 12:21:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 9 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:21:37,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 18 proven. 52 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 12:21:40,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451802318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:40,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:40,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 32, 21] total 65 [2022-11-16 12:21:40,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703296769] [2022-11-16 12:21:40,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:40,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 12:21:40,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:40,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 12:21:40,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=3874, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 12:21:40,495 INFO L87 Difference]: Start difference. First operand 694 states and 863 transitions. Second operand has 65 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:22:44,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:22:45,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:23:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:04,441 INFO L93 Difference]: Finished difference Result 6102 states and 7868 transitions. [2022-11-16 12:23:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-11-16 12:23:04,442 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 80 [2022-11-16 12:23:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:04,455 INFO L225 Difference]: With dead ends: 6102 [2022-11-16 12:23:04,455 INFO L226 Difference]: Without dead ends: 5324 [2022-11-16 12:23:04,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26027 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=6474, Invalid=71646, Unknown=0, NotChecked=0, Total=78120 [2022-11-16 12:23:04,465 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 6500 mSDsluCounter, 9391 mSDsCounter, 0 mSdLazyCounter, 15317 mSolverCounterSat, 1537 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6501 SdHoareTripleChecker+Valid, 9718 SdHoareTripleChecker+Invalid, 16855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1537 IncrementalHoareTripleChecker+Valid, 15317 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:04,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6501 Valid, 9718 Invalid, 16855 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1537 Valid, 15317 Invalid, 1 Unknown, 0 Unchecked, 37.8s Time] [2022-11-16 12:23:04,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2022-11-16 12:23:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 976. [2022-11-16 12:23:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 951 states have (on average 1.2639327024185067) internal successors, (1202), 952 states have internal predecessors, (1202), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:23:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1233 transitions. [2022-11-16 12:23:05,940 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1233 transitions. Word has length 80 [2022-11-16 12:23:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:05,941 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1233 transitions. [2022-11-16 12:23:05,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:23:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1233 transitions. [2022-11-16 12:23:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-16 12:23:05,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:05,943 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2022-11-16 12:23:05,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-16 12:23:06,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:06,144 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:23:06,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:06,144 INFO L85 PathProgramCache]: Analyzing trace with hash 216048157, now seen corresponding path program 21 times [2022-11-16 12:23:06,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:06,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4001397] [2022-11-16 12:23:06,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:06,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:06,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:23:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:06,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:23:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-16 12:23:06,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4001397] [2022-11-16 12:23:06,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4001397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:23:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796106670] [2022-11-16 12:23:06,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:23:06,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:23:06,845 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:23:06,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-16 12:23:13,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 12:23:13,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:23:13,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 12:23:13,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:23:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 12:23:14,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:23:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-16 12:23:15,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796106670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:23:15,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:23:15,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 16] total 46 [2022-11-16 12:23:15,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980597767] [2022-11-16 12:23:15,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:23:15,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 12:23:15,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:15,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 12:23:15,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 12:23:15,259 INFO L87 Difference]: Start difference. First operand 976 states and 1233 transitions. Second operand has 46 states, 46 states have (on average 2.5652173913043477) internal successors, (118), 46 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:23:32,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:32,732 INFO L93 Difference]: Finished difference Result 3603 states and 4573 transitions. [2022-11-16 12:23:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-16 12:23:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.5652173913043477) internal successors, (118), 46 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 81 [2022-11-16 12:23:32,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:32,741 INFO L225 Difference]: With dead ends: 3603 [2022-11-16 12:23:32,742 INFO L226 Difference]: Without dead ends: 3037 [2022-11-16 12:23:32,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1337, Invalid=11319, Unknown=0, NotChecked=0, Total=12656 [2022-11-16 12:23:32,745 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 3295 mSDsluCounter, 6073 mSDsCounter, 0 mSdLazyCounter, 4537 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3299 SdHoareTripleChecker+Valid, 6387 SdHoareTripleChecker+Invalid, 5073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 4537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:32,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3299 Valid, 6387 Invalid, 5073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 4537 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-16 12:23:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2022-11-16 12:23:34,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 1088. [2022-11-16 12:23:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1063 states have (on average 1.2812793979303858) internal successors, (1362), 1064 states have internal predecessors, (1362), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:23:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1393 transitions. [2022-11-16 12:23:34,227 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1393 transitions. Word has length 81 [2022-11-16 12:23:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:34,228 INFO L495 AbstractCegarLoop]: Abstraction has 1088 states and 1393 transitions. [2022-11-16 12:23:34,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.5652173913043477) internal successors, (118), 46 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:23:34,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1393 transitions. [2022-11-16 12:23:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-16 12:23:34,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:34,230 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 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] [2022-11-16 12:23:34,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-16 12:23:34,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:34,433 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:23:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:34,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1864601601, now seen corresponding path program 5 times [2022-11-16 12:23:34,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:34,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412862079] [2022-11-16 12:23:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:34,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:34,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:23:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:34,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:23:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 12:23:34,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412862079] [2022-11-16 12:23:34,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412862079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:23:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027702251] [2022-11-16 12:23:34,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:23:34,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:34,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:23:34,862 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:23:34,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a928ac08-93ba-4094-a456-ab32e283ef6e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process