./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc --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 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- 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-5e519f3 [2022-11-02 21:09:46,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:09:46,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:09:46,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:09:46,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:09:46,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:09:46,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:09:46,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:09:46,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:09:46,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:09:46,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:09:46,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:09:46,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:09:46,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:09:46,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:09:46,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:09:46,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:09:46,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:09:46,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:09:46,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:09:46,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:09:46,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:09:46,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:09:46,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:09:46,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:09:46,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:09:46,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:09:46,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:09:46,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:09:46,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:09:46,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:09:46,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:09:46,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:09:46,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:09:46,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:09:46,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:09:46,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:09:46,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:09:46,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:09:46,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:09:46,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:09:46,824 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:09:46,864 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:09:46,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:09:46,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:09:46,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:09:46,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:09:46,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:09:46,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:09:46,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:09:46,872 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:09:46,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:09:46,874 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:09:46,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:09:46,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:09:46,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:09:46,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:09:46,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:09:46,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:09:46,875 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:09:46,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:09:46,876 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:09:46,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:09:46,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:09:46,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:09:46,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:09:46,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:09:46,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:09:46,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:09:46,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:09:46,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:09:46,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:09:46,880 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:09:46,880 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:09:46,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:09:46,880 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_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2022-11-02 21:09:47,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:09:47,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:09:47,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:09:47,225 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:09:47,226 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:09:47,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2022-11-02 21:09:47,309 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/data/20f805710/e8621ec52ddb4bd79b2e1a977d760b83/FLAG886fa5242 [2022-11-02 21:09:47,824 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:09:47,825 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2022-11-02 21:09:47,836 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/data/20f805710/e8621ec52ddb4bd79b2e1a977d760b83/FLAG886fa5242 [2022-11-02 21:09:48,195 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/data/20f805710/e8621ec52ddb4bd79b2e1a977d760b83 [2022-11-02 21:09:48,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:09:48,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:09:48,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:09:48,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:09:48,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:09:48,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74565c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48, skipping insertion in model container [2022-11-02 21:09:48,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:09:48,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:09:48,415 WARN L230 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_8fb27777-2d50-4f96-8237-b6fba8967fec/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2022-11-02 21:09:48,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:09:48,462 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:09:48,480 WARN L230 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_8fb27777-2d50-4f96-8237-b6fba8967fec/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2022-11-02 21:09:48,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:09:48,515 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:09:48,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48 WrapperNode [2022-11-02 21:09:48,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:09:48,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:09:48,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:09:48,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:09:48,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,563 INFO L138 Inliner]: procedures = 17, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2022-11-02 21:09:48,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:09:48,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:09:48,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:09:48,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:09:48,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,586 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:09:48,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:09:48,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:09:48,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:09:48,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48" (1/1) ... [2022-11-02 21:09:48,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:09:48,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:48,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:09:48,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:09:48,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:09:48,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:09:48,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:09:48,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:09:48,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:09:48,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:09:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:09:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:09:48,754 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:09:48,756 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:09:48,924 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:09:48,930 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:09:48,930 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 21:09:48,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:09:48 BoogieIcfgContainer [2022-11-02 21:09:48,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:09:48,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:09:48,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:09:48,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:09:48,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:09:48" (1/3) ... [2022-11-02 21:09:48,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e56201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:09:48, skipping insertion in model container [2022-11-02 21:09:48,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:09:48" (2/3) ... [2022-11-02 21:09:48,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e56201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:09:48, skipping insertion in model container [2022-11-02 21:09:48,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:09:48" (3/3) ... [2022-11-02 21:09:48,959 INFO L112 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2022-11-02 21:09:48,986 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:09:48,987 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:09:49,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:09:49,057 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;@4e3b98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:09:49,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:09:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:49,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 21:09:49,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:49,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:49,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2022-11-02 21:09:49,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:49,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136665676] [2022-11-02 21:09:49,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:49,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:49,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:49,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136665676] [2022-11-02 21:09:49,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136665676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:49,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:49,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:09:49,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982017983] [2022-11-02 21:09:49,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:49,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:09:49,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:09:49,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:09:49,313 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:49,333 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-11-02 21:09:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:09:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-02 21:09:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:49,356 INFO L225 Difference]: With dead ends: 36 [2022-11-02 21:09:49,356 INFO L226 Difference]: Without dead ends: 16 [2022-11-02 21:09:49,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:09:49,367 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2022-11-02 21:09:49,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:09:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-02 21:09:49,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-02 21:09:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-02 21:09:49,408 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2022-11-02 21:09:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:49,408 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-02 21:09:49,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-02 21:09:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 21:09:49,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:49,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:49,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:09:49,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:49,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1919336157, now seen corresponding path program 1 times [2022-11-02 21:09:49,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:49,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728836402] [2022-11-02 21:09:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:49,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:49,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:49,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728836402] [2022-11-02 21:09:49,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728836402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:49,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:49,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:09:49,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417674064] [2022-11-02 21:09:49,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:49,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:09:49,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:49,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:09:49,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:09:49,609 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:49,699 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-11-02 21:09:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:09:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-02 21:09:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:49,701 INFO L225 Difference]: With dead ends: 34 [2022-11-02 21:09:49,701 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 21:09:49,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:09:49,703 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:49,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:09:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 21:09:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2022-11-02 21:09:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-02 21:09:49,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-11-02 21:09:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:49,708 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-02 21:09:49,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-02 21:09:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 21:09:49,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:49,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:49,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:09:49,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:49,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1200955363, now seen corresponding path program 1 times [2022-11-02 21:09:49,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:49,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661767462] [2022-11-02 21:09:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:49,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:49,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:49,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661767462] [2022-11-02 21:09:49,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661767462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:49,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600912222] [2022-11-02 21:09:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:49,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:49,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:49,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:49,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:09:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:49,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:09:49,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:50,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:09:50,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600912222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:50,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:09:50,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 21:09:50,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275539010] [2022-11-02 21:09:50,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:50,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:09:50,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:50,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:09:50,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:50,010 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:50,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:50,022 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-11-02 21:09:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:09:50,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 21:09:50,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:50,024 INFO L225 Difference]: With dead ends: 31 [2022-11-02 21:09:50,024 INFO L226 Difference]: Without dead ends: 17 [2022-11-02 21:09:50,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:50,026 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:50,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:09:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-02 21:09:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-02 21:09:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-02 21:09:50,030 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2022-11-02 21:09:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:50,031 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-02 21:09:50,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-02 21:09:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 21:09:50,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:50,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:50,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:50,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:50,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:50,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:50,276 INFO L85 PathProgramCache]: Analyzing trace with hash 391608737, now seen corresponding path program 1 times [2022-11-02 21:09:50,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:50,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330963497] [2022-11-02 21:09:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:50,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:09:50,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330963497] [2022-11-02 21:09:50,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330963497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:50,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836544909] [2022-11-02 21:09:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:50,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:50,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:50,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:50,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:09:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:50,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:09:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:09:50,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:09:50,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836544909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:50,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:09:50,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 21:09:50,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721182396] [2022-11-02 21:09:50,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:50,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:09:50,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:50,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:09:50,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:50,529 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:50,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:50,540 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-11-02 21:09:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:09:50,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 21:09:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:50,541 INFO L225 Difference]: With dead ends: 32 [2022-11-02 21:09:50,542 INFO L226 Difference]: Without dead ends: 19 [2022-11-02 21:09:50,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:09:50,543 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:50,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:09:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-02 21:09:50,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-11-02 21:09:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-02 21:09:50,548 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2022-11-02 21:09:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:50,548 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-02 21:09:50,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-02 21:09:50,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 21:09:50,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:50,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:50,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:50,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:50,775 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:50,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:50,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2027280351, now seen corresponding path program 1 times [2022-11-02 21:09:50,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:50,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935688253] [2022-11-02 21:09:50,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:50,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:09:50,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:50,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935688253] [2022-11-02 21:09:50,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935688253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:50,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179592066] [2022-11-02 21:09:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:50,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:50,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:50,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:50,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:09:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:50,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:09:50,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:09:50,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:09:51,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179592066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:51,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:51,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-02 21:09:51,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109784290] [2022-11-02 21:09:51,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:51,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:09:51,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:09:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:09:51,017 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:51,097 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-11-02 21:09:51,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:09:51,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-02 21:09:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:51,099 INFO L225 Difference]: With dead ends: 56 [2022-11-02 21:09:51,099 INFO L226 Difference]: Without dead ends: 43 [2022-11-02 21:09:51,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:09:51,100 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:51,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 48 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:09:51,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-02 21:09:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-11-02 21:09:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-02 21:09:51,107 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2022-11-02 21:09:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:51,107 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-02 21:09:51,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-02 21:09:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 21:09:51,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:51,109 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:51,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:51,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:51,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2044266853, now seen corresponding path program 2 times [2022-11-02 21:09:51,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:51,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229271486] [2022-11-02 21:09:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:51,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 21:09:51,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:51,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229271486] [2022-11-02 21:09:51,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229271486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:51,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855620830] [2022-11-02 21:09:51,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:09:51,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:51,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:51,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:51,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:09:51,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:09:51,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:09:51,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:09:51,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:09:51,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855620830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:51,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:51,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-11-02 21:09:51,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338188304] [2022-11-02 21:09:51,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:51,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 21:09:51,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:51,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 21:09:51,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:09:51,792 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:51,905 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-11-02 21:09:51,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:09:51,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-02 21:09:51,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:51,911 INFO L225 Difference]: With dead ends: 81 [2022-11-02 21:09:51,911 INFO L226 Difference]: Without dead ends: 65 [2022-11-02 21:09:51,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:09:51,912 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:51,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 54 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:09:51,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-02 21:09:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2022-11-02 21:09:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:51,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-11-02 21:09:51,925 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2022-11-02 21:09:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:51,925 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-11-02 21:09:51,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-11-02 21:09:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 21:09:51,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:51,927 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:51,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:52,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 21:09:52,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:52,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1130748941, now seen corresponding path program 3 times [2022-11-02 21:09:52,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:52,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839114755] [2022-11-02 21:09:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:52,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-02 21:09:52,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:52,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839114755] [2022-11-02 21:09:52,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839114755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:52,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849033224] [2022-11-02 21:09:52,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:09:52,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:52,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:52,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:52,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:09:52,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 21:09:52,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:52,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:09:52,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-02 21:09:52,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:52,723 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-02 21:09:52,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-11-02 21:09:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-02 21:09:52,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849033224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:52,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:52,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2022-11-02 21:09:52,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902972059] [2022-11-02 21:09:52,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:52,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 21:09:52,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:52,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 21:09:52,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:09:52,732 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:53,009 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2022-11-02 21:09:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:09:53,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-02 21:09:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:53,011 INFO L225 Difference]: With dead ends: 94 [2022-11-02 21:09:53,011 INFO L226 Difference]: Without dead ends: 86 [2022-11-02 21:09:53,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:09:53,013 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:53,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 106 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:09:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-02 21:09:53,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 48. [2022-11-02 21:09:53,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-11-02 21:09:53,021 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2022-11-02 21:09:53,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:53,022 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-11-02 21:09:53,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:53,022 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-11-02 21:09:53,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 21:09:53,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:53,023 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:53,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:53,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 21:09:53,243 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:53,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:53,244 INFO L85 PathProgramCache]: Analyzing trace with hash 927320518, now seen corresponding path program 1 times [2022-11-02 21:09:53,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:53,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131159127] [2022-11-02 21:09:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:53,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-02 21:09:53,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:53,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131159127] [2022-11-02 21:09:53,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131159127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:09:53,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:09:53,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:09:53,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229236520] [2022-11-02 21:09:53,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:09:53,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:09:53,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:53,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:09:53,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:09:53,306 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:53,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:53,312 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-11-02 21:09:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:09:53,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-02 21:09:53,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:53,313 INFO L225 Difference]: With dead ends: 55 [2022-11-02 21:09:53,314 INFO L226 Difference]: Without dead ends: 48 [2022-11-02 21:09:53,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:09:53,315 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:53,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:09:53,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-02 21:09:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-02 21:09:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-11-02 21:09:53,322 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2022-11-02 21:09:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:53,323 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-11-02 21:09:53,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-11-02 21:09:53,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 21:09:53,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:53,324 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:53,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 21:09:53,324 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:53,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:53,325 INFO L85 PathProgramCache]: Analyzing trace with hash 2012771472, now seen corresponding path program 1 times [2022-11-02 21:09:53,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:53,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156410682] [2022-11-02 21:09:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:53,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-02 21:09:53,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:53,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156410682] [2022-11-02 21:09:53,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156410682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:53,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230547957] [2022-11-02 21:09:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:53,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:53,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:53,457 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:53,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:09:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:53,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 21:09:53,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 21:09:53,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 21:09:54,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230547957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:54,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:54,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 13] total 29 [2022-11-02 21:09:54,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089099498] [2022-11-02 21:09:54,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:54,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 21:09:54,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 21:09:54,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:09:54,153 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:54,319 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2022-11-02 21:09:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 21:09:54,320 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-02 21:09:54,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:54,321 INFO L225 Difference]: With dead ends: 132 [2022-11-02 21:09:54,321 INFO L226 Difference]: Without dead ends: 107 [2022-11-02 21:09:54,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:09:54,323 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:54,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 76 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:09:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-02 21:09:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2022-11-02 21:09:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-11-02 21:09:54,335 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 47 [2022-11-02 21:09:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:54,336 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-11-02 21:09:54,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-11-02 21:09:54,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:09:54,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:54,338 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:54,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:54,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:54,551 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 426637324, now seen corresponding path program 2 times [2022-11-02 21:09:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:54,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84790328] [2022-11-02 21:09:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2022-11-02 21:09:54,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:54,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84790328] [2022-11-02 21:09:54,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84790328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:54,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050760774] [2022-11-02 21:09:54,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:09:54,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:54,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:54,847 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:54,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:09:54,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:09:54,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:54,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 21:09:54,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 21:09:55,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 21:09:56,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050760774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:56,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:56,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25, 25] total 54 [2022-11-02 21:09:56,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370564400] [2022-11-02 21:09:56,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:56,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-02 21:09:56,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:56,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-02 21:09:56,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=1707, Unknown=0, NotChecked=0, Total=2862 [2022-11-02 21:09:56,655 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:56,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:56,943 INFO L93 Difference]: Finished difference Result 193 states and 221 transitions. [2022-11-02 21:09:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-02 21:09:56,944 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:09:56,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:56,947 INFO L225 Difference]: With dead ends: 193 [2022-11-02 21:09:56,948 INFO L226 Difference]: Without dead ends: 165 [2022-11-02 21:09:56,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1155, Invalid=1707, Unknown=0, NotChecked=0, Total=2862 [2022-11-02 21:09:56,950 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:56,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 112 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:09:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-02 21:09:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2022-11-02 21:09:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2022-11-02 21:09:56,986 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 74 [2022-11-02 21:09:56,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:56,987 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2022-11-02 21:09:56,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:56,987 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2022-11-02 21:09:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-02 21:09:56,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:56,995 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:57,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:57,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:09:57,211 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:57,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash -374145592, now seen corresponding path program 3 times [2022-11-02 21:09:57,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:57,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834077973] [2022-11-02 21:09:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2022-11-02 21:09:57,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:57,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834077973] [2022-11-02 21:09:57,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834077973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:57,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705259276] [2022-11-02 21:09:57,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:09:57,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:57,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:57,623 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:57,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:09:57,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 21:09:57,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 21:09:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2022-11-02 21:09:57,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:58,037 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-02 21:09:58,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-11-02 21:09:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2022-11-02 21:09:58,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705259276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:58,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:58,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-11-02 21:09:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104490472] [2022-11-02 21:09:58,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:58,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:09:58,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:58,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:09:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:09:58,058 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:58,359 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2022-11-02 21:09:58,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 21:09:58,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2022-11-02 21:09:58,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:58,364 INFO L225 Difference]: With dead ends: 184 [2022-11-02 21:09:58,365 INFO L226 Difference]: Without dead ends: 173 [2022-11-02 21:09:58,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:09:58,366 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 190 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:58,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 96 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:09:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-02 21:09:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 134. [2022-11-02 21:09:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-11-02 21:09:58,397 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 125 [2022-11-02 21:09:58,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:58,401 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-11-02 21:09:58,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-11-02 21:09:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-02 21:09:58,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:58,406 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 7, 7, 7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:58,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:58,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:58,627 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1426478299, now seen corresponding path program 4 times [2022-11-02 21:09:58,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:58,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389341383] [2022-11-02 21:09:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:58,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-02 21:09:58,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:58,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389341383] [2022-11-02 21:09:58,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389341383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:58,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515288095] [2022-11-02 21:09:58,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:09:58,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:58,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:58,966 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:58,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:09:59,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:09:59,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:59,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:09:59,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-02 21:09:59,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-02 21:09:59,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515288095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:59,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:59,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-11-02 21:09:59,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990638464] [2022-11-02 21:09:59,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:59,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:09:59,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:09:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:09:59,353 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:59,509 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2022-11-02 21:09:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:09:59,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-11-02 21:09:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:59,511 INFO L225 Difference]: With dead ends: 271 [2022-11-02 21:09:59,511 INFO L226 Difference]: Without dead ends: 255 [2022-11-02 21:09:59,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:09:59,513 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 318 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:59,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 98 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:09:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-02 21:09:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 161. [2022-11-02 21:09:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2022-11-02 21:09:59,529 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 133 [2022-11-02 21:09:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:59,529 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2022-11-02 21:09:59,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:09:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2022-11-02 21:09:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-02 21:09:59,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:59,531 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 16, 16, 16, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:59,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:59,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 21:09:59,753 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:59,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1100159513, now seen corresponding path program 5 times [2022-11-02 21:09:59,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:59,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292732672] [2022-11-02 21:09:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:59,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-02 21:10:00,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:10:00,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292732672] [2022-11-02 21:10:00,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292732672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:00,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885912021] [2022-11-02 21:10:00,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:10:00,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:00,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:10:00,489 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:10:00,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:10:37,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-02 21:10:37,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:10:37,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 21:10:37,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-02 21:10:37,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-02 21:10:38,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885912021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:10:38,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:10:38,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-11-02 21:10:38,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075900448] [2022-11-02 21:10:38,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:10:38,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 21:10:38,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:10:38,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 21:10:38,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 21:10:38,383 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:38,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:10:38,864 INFO L93 Difference]: Finished difference Result 451 states and 471 transitions. [2022-11-02 21:10:38,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 21:10:38,865 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-02 21:10:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:10:38,867 INFO L225 Difference]: With dead ends: 451 [2022-11-02 21:10:38,868 INFO L226 Difference]: Without dead ends: 435 [2022-11-02 21:10:38,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 21:10:38,870 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 916 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:10:38,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 184 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:10:38,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-02 21:10:38,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 215. [2022-11-02 21:10:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.014018691588785) internal successors, (217), 214 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2022-11-02 21:10:38,920 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 160 [2022-11-02 21:10:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:10:38,921 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2022-11-02 21:10:38,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2022-11-02 21:10:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-02 21:10:38,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:10:38,926 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 34, 34, 34, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:10:38,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:39,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:39,139 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:10:39,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:39,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1453073049, now seen corresponding path program 6 times [2022-11-02 21:10:39,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:10:39,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143031458] [2022-11-02 21:10:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:39,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:10:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2022-11-02 21:10:41,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:10:41,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143031458] [2022-11-02 21:10:41,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143031458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:41,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044888792] [2022-11-02 21:10:41,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:10:41,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:41,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:10:41,235 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:10:41,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 21:10:41,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-11-02 21:10:41,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:10:41,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 21:10:41,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2022-11-02 21:10:42,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:42,664 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-02 21:10:42,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-11-02 21:10:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 31 proven. 240 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2022-11-02 21:10:42,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044888792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:10:42,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:10:42,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 11, 11] total 49 [2022-11-02 21:10:42,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421864477] [2022-11-02 21:10:42,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:10:42,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-02 21:10:42,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:10:42,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-02 21:10:42,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=1480, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 21:10:42,696 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 49 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:10:44,612 INFO L93 Difference]: Finished difference Result 467 states and 471 transitions. [2022-11-02 21:10:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-02 21:10:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 49 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2022-11-02 21:10:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:10:44,615 INFO L225 Difference]: With dead ends: 467 [2022-11-02 21:10:44,615 INFO L226 Difference]: Without dead ends: 451 [2022-11-02 21:10:44,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 414 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2301, Invalid=4671, Unknown=0, NotChecked=0, Total=6972 [2022-11-02 21:10:44,621 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1286 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:10:44,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 282 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:10:44,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-02 21:10:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 223. [2022-11-02 21:10:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:44,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2022-11-02 21:10:44,674 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 214 [2022-11-02 21:10:44,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:10:44,674 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2022-11-02 21:10:44,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 49 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2022-11-02 21:10:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-02 21:10:44,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:10:44,678 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 35, 35, 35, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:10:44,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:44,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 21:10:44,903 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:10:44,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:44,904 INFO L85 PathProgramCache]: Analyzing trace with hash 555566940, now seen corresponding path program 7 times [2022-11-02 21:10:44,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:10:44,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303503719] [2022-11-02 21:10:44,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:44,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:10:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 2140 trivial. 0 not checked. [2022-11-02 21:10:46,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:10:46,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303503719] [2022-11-02 21:10:46,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303503719] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:46,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393458439] [2022-11-02 21:10:46,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:10:46,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:46,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:10:46,944 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:10:46,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 21:10:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:47,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 21:10:47,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1844 trivial. 0 not checked. [2022-11-02 21:10:50,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:10:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1844 trivial. 0 not checked. [2022-11-02 21:10:54,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393458439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:10:54,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:10:54,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 49, 49] total 132 [2022-11-02 21:10:54,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772147573] [2022-11-02 21:10:54,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:10:54,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-11-02 21:10:54,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:10:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-11-02 21:10:54,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5262, Invalid=12030, Unknown=0, NotChecked=0, Total=17292 [2022-11-02 21:10:54,279 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 132 states, 132 states have (on average 2.371212121212121) internal successors, (313), 132 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:55,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:10:55,360 INFO L93 Difference]: Finished difference Result 685 states and 737 transitions. [2022-11-02 21:10:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-02 21:10:55,362 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.371212121212121) internal successors, (313), 132 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-02 21:10:55,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:10:55,366 INFO L225 Difference]: With dead ends: 685 [2022-11-02 21:10:55,366 INFO L226 Difference]: Without dead ends: 557 [2022-11-02 21:10:55,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3290 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5262, Invalid=12030, Unknown=0, NotChecked=0, Total=17292 [2022-11-02 21:10:55,380 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 796 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:10:55,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 256 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:10:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-11-02 21:10:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 322. [2022-11-02 21:10:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.0093457943925233) internal successors, (324), 321 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 324 transitions. [2022-11-02 21:10:55,435 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 324 transitions. Word has length 222 [2022-11-02 21:10:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:10:55,436 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 324 transitions. [2022-11-02 21:10:55,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.371212121212121) internal successors, (313), 132 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:10:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 324 transitions. [2022-11-02 21:10:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-11-02 21:10:55,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:10:55,443 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 36, 36, 36, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:10:55,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:55,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 21:10:55,659 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:10:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:55,660 INFO L85 PathProgramCache]: Analyzing trace with hash 194024584, now seen corresponding path program 8 times [2022-11-02 21:10:55,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:10:55,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914156411] [2022-11-02 21:10:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:55,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:10:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10786 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 8860 trivial. 0 not checked. [2022-11-02 21:10:58,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:10:58,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914156411] [2022-11-02 21:10:58,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914156411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:58,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855194102] [2022-11-02 21:10:58,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:10:58,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:58,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:10:58,460 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:10:58,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 21:10:58,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:10:58,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:10:58,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-02 21:10:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10786 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2022-11-02 21:11:06,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10786 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2022-11-02 21:11:21,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855194102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:21,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:21,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 97, 97] total 229 [2022-11-02 21:11:21,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271595660] [2022-11-02 21:11:21,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:21,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 229 states [2022-11-02 21:11:21,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:21,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 229 interpolants. [2022-11-02 21:11:21,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19076, Invalid=33136, Unknown=0, NotChecked=0, Total=52212 [2022-11-02 21:11:21,751 INFO L87 Difference]: Start difference. First operand 322 states and 324 transitions. Second operand has 229 states, 229 states have (on average 2.2183406113537116) internal successors, (508), 229 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:23,893 INFO L93 Difference]: Finished difference Result 890 states and 990 transitions. [2022-11-02 21:11:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-02 21:11:23,894 INFO L78 Accepts]: Start accepts. Automaton has has 229 states, 229 states have (on average 2.2183406113537116) internal successors, (508), 229 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2022-11-02 21:11:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:23,898 INFO L225 Difference]: With dead ends: 890 [2022-11-02 21:11:23,898 INFO L226 Difference]: Without dead ends: 759 [2022-11-02 21:11:23,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6840 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=19076, Invalid=33136, Unknown=0, NotChecked=0, Total=52212 [2022-11-02 21:11:23,903 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1043 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:23,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 216 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:11:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-11-02 21:11:23,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 517. [2022-11-02 21:11:23,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.005813953488372) internal successors, (519), 516 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 519 transitions. [2022-11-02 21:11:23,943 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 519 transitions. Word has length 321 [2022-11-02 21:11:23,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:23,944 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 519 transitions. [2022-11-02 21:11:23,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 229 states, 229 states have (on average 2.2183406113537116) internal successors, (508), 229 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 519 transitions. [2022-11-02 21:11:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-11-02 21:11:23,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:23,958 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 37, 37, 37, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:24,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:24,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 21:11:24,183 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:24,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1185820924, now seen corresponding path program 9 times [2022-11-02 21:11:24,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:24,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326692874] [2022-11-02 21:11:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:24,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38159 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 36124 trivial. 0 not checked. [2022-11-02 21:11:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:28,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326692874] [2022-11-02 21:11:28,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326692874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:28,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269392960] [2022-11-02 21:11:28,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:11:28,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:28,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:28,019 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:28,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 21:11:28,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-02 21:11:28,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:28,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 21:11:28,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 38159 backedges. 0 proven. 409 refuted. 0 times theorem prover too weak. 37750 trivial. 0 not checked. [2022-11-02 21:11:29,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:29,537 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-02 21:11:29,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-11-02 21:11:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 38159 backedges. 33 proven. 376 refuted. 0 times theorem prover too weak. 37750 trivial. 0 not checked. [2022-11-02 21:11:29,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269392960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:29,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:29,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13, 13] total 55 [2022-11-02 21:11:29,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350255635] [2022-11-02 21:11:29,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:29,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-02 21:11:29,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:29,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-02 21:11:29,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1889, Unknown=0, NotChecked=0, Total=2970 [2022-11-02 21:11:29,581 INFO L87 Difference]: Start difference. First operand 517 states and 519 transitions. Second operand has 55 states, 55 states have (on average 3.2363636363636363) internal successors, (178), 55 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:31,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:31,588 INFO L93 Difference]: Finished difference Result 788 states and 792 transitions. [2022-11-02 21:11:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 21:11:31,589 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.2363636363636363) internal successors, (178), 55 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 516 [2022-11-02 21:11:31,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:31,593 INFO L225 Difference]: With dead ends: 788 [2022-11-02 21:11:31,594 INFO L226 Difference]: Without dead ends: 767 [2022-11-02 21:11:31,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1107 GetRequests, 1015 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2700, Invalid=5672, Unknown=0, NotChecked=0, Total=8372 [2022-11-02 21:11:31,596 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1299 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:31,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 338 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:11:31,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-11-02 21:11:31,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 525. [2022-11-02 21:11:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.0057251908396947) internal successors, (527), 524 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:31,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 527 transitions. [2022-11-02 21:11:31,700 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 527 transitions. Word has length 516 [2022-11-02 21:11:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:31,702 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 527 transitions. [2022-11-02 21:11:31,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.2363636363636363) internal successors, (178), 55 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:31,702 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 527 transitions. [2022-11-02 21:11:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2022-11-02 21:11:31,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:31,727 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 38, 38, 38, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:31,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:31,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 21:11:31,955 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1093515801, now seen corresponding path program 10 times [2022-11-02 21:11:31,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109431449] [2022-11-02 21:11:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:31,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 38289 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2022-11-02 21:11:35,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:35,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109431449] [2022-11-02 21:11:35,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109431449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:35,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495834390] [2022-11-02 21:11:35,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:11:35,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:35,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:35,088 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:35,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 21:11:35,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:11:35,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:35,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 2095 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 21:11:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 38289 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2022-11-02 21:11:35,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 38289 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2022-11-02 21:11:38,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495834390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:38,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:38,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2022-11-02 21:11:38,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218570782] [2022-11-02 21:11:38,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:38,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-02 21:11:38,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:38,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-02 21:11:38,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2022-11-02 21:11:38,431 INFO L87 Difference]: Start difference. First operand 525 states and 527 transitions. Second operand has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:40,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:40,720 INFO L93 Difference]: Finished difference Result 1185 states and 1227 transitions. [2022-11-02 21:11:40,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-02 21:11:40,721 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 524 [2022-11-02 21:11:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:40,728 INFO L225 Difference]: With dead ends: 1185 [2022-11-02 21:11:40,729 INFO L226 Difference]: Without dead ends: 1159 [2022-11-02 21:11:40,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 1008 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2022-11-02 21:11:40,731 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2014 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2014 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:40,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2014 Valid, 406 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:11:40,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-11-02 21:11:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 645. [2022-11-02 21:11:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.0046583850931676) internal successors, (647), 644 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 647 transitions. [2022-11-02 21:11:40,822 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 647 transitions. Word has length 524 [2022-11-02 21:11:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:40,823 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 647 transitions. [2022-11-02 21:11:40,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 647 transitions. [2022-11-02 21:11:40,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2022-11-02 21:11:40,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:40,830 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 78, 78, 78, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:40,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-02 21:11:41,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 21:11:41,039 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:41,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:41,040 INFO L85 PathProgramCache]: Analyzing trace with hash -649956327, now seen corresponding path program 11 times [2022-11-02 21:11:41,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:41,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177212698] [2022-11-02 21:11:41,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:41,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 45229 backedges. 0 proven. 9087 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2022-11-02 21:11:49,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:49,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177212698] [2022-11-02 21:11:49,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177212698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:49,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641674083] [2022-11-02 21:11:49,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:11:49,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:49,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:49,579 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:49,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb27777-2d50-4f96-8237-b6fba8967fec/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process