./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/theatreSquare.c --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_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/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_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/theatreSquare.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/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_6fab4e16-0143-4141-990b-d2f5fbb330e6/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 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 --- 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 20:59:03,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:59:03,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:59:03,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:59:03,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:59:03,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:59:03,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:59:03,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:59:03,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:59:03,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:59:03,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:59:03,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:59:03,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:59:03,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:59:03,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:59:03,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:59:03,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:59:03,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:59:03,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:59:03,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:59:03,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:59:03,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:59:03,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:59:03,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:59:03,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:59:03,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:59:03,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:59:03,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:59:03,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:59:03,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:59:03,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:59:03,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:59:03,769 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:59:03,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:59:03,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:59:03,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:59:03,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:59:03,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:59:03,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:59:03,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:59:03,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:59:03,775 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:59:03,820 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:59:03,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:59:03,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:59:03,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:59:03,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:59:03,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:59:03,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:59:03,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:59:03,823 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:59:03,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:59:03,825 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:59:03,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:59:03,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:59:03,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:59:03,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:59:03,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:59:03,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:59:03,826 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:59:03,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:59:03,826 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:59:03,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:59:03,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:59:03,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:59:03,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:59:03,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:59:03,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:59:03,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:59:03,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:59:03,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:59:03,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:59:03,830 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:59:03,830 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:59:03,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:59:03,831 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_6fab4e16-0143-4141-990b-d2f5fbb330e6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 [2022-11-02 20:59:04,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:59:04,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:59:04,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:59:04,195 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:59:04,196 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:59:04,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2022-11-02 20:59:04,276 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/data/214ed8019/ff53b7e6f9a24e30a021a1371eabb095/FLAG856316b12 [2022-11-02 20:59:04,786 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:59:04,787 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2022-11-02 20:59:04,793 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/data/214ed8019/ff53b7e6f9a24e30a021a1371eabb095/FLAG856316b12 [2022-11-02 20:59:05,149 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/data/214ed8019/ff53b7e6f9a24e30a021a1371eabb095 [2022-11-02 20:59:05,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:59:05,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:59:05,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:59:05,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:59:05,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:59:05,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b181485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05, skipping insertion in model container [2022-11-02 20:59:05,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:59:05,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:59:05,444 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_6fab4e16-0143-4141-990b-d2f5fbb330e6/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2022-11-02 20:59:05,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:59:05,493 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:59:05,513 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_6fab4e16-0143-4141-990b-d2f5fbb330e6/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2022-11-02 20:59:05,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:59:05,547 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:59:05,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05 WrapperNode [2022-11-02 20:59:05,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:59:05,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:59:05,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:59:05,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:59:05,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,595 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2022-11-02 20:59:05,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:59:05,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:59:05,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:59:05,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:59:05,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,640 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:59:05,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:59:05,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:59:05,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:59:05,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05" (1/1) ... [2022-11-02 20:59:05,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:59:05,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:05,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:59:05,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:59:05,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:59:05,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:59:05,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:59:05,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:59:05,867 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:59:05,869 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:59:06,137 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:59:06,143 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:59:06,143 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-02 20:59:06,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:59:06 BoogieIcfgContainer [2022-11-02 20:59:06,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:59:06,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:59:06,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:59:06,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:59:06,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:59:05" (1/3) ... [2022-11-02 20:59:06,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56da3cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:59:06, skipping insertion in model container [2022-11-02 20:59:06,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:59:05" (2/3) ... [2022-11-02 20:59:06,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56da3cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:59:06, skipping insertion in model container [2022-11-02 20:59:06,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:59:06" (3/3) ... [2022-11-02 20:59:06,172 INFO L112 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2022-11-02 20:59:06,196 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:59:06,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:59:06,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:59:06,272 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;@596694d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:59:06,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:59:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 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 20:59:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:59:06,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:06,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:59:06,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:06,295 INFO L85 PathProgramCache]: Analyzing trace with hash 891969447, now seen corresponding path program 1 times [2022-11-02 20:59:06,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:06,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903476589] [2022-11-02 20:59:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:06,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:06,707 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 20:59:06,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:06,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903476589] [2022-11-02 20:59:06,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903476589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:06,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:06,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:59:06,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407435134] [2022-11-02 20:59:06,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:06,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:59:06,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:06,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:59:06,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:59:06,760 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 20:59:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:06,838 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2022-11-02 20:59:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:59:06,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-02 20:59:06,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:06,850 INFO L225 Difference]: With dead ends: 48 [2022-11-02 20:59:06,850 INFO L226 Difference]: Without dead ends: 19 [2022-11-02 20:59:06,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:59:06,857 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:06,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-02 20:59:06,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-02 20:59:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 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 20:59:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-02 20:59:06,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2022-11-02 20:59:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:06,892 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-02 20:59:06,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 20:59:06,892 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-02 20:59:06,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:59:06,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:06,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:06,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:59:06,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:06,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:06,895 INFO L85 PathProgramCache]: Analyzing trace with hash 535820783, now seen corresponding path program 1 times [2022-11-02 20:59:06,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:06,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311037628] [2022-11-02 20:59:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:06,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:07,182 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 20:59:07,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:07,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311037628] [2022-11-02 20:59:07,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311037628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:07,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:07,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:59:07,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807299656] [2022-11-02 20:59:07,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:07,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:59:07,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:07,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:59:07,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:59:07,187 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 20:59:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:07,352 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-11-02 20:59:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:59:07,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 18 [2022-11-02 20:59:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:07,355 INFO L225 Difference]: With dead ends: 39 [2022-11-02 20:59:07,355 INFO L226 Difference]: Without dead ends: 33 [2022-11-02 20:59:07,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:59:07,357 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:07,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 133 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-02 20:59:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-11-02 20:59:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 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 20:59:07,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-11-02 20:59:07,367 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2022-11-02 20:59:07,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:07,368 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-11-02 20:59:07,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 20:59:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-11-02 20:59:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-02 20:59:07,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:07,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:07,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:59:07,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:07,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1031838486, now seen corresponding path program 1 times [2022-11-02 20:59:07,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:07,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044940791] [2022-11-02 20:59:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:07,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:07,478 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 20:59:07,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:07,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044940791] [2022-11-02 20:59:07,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044940791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:07,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:07,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:59:07,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983574028] [2022-11-02 20:59:07,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:07,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:59:07,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:07,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:59:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:59:07,482 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 20:59:07,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:07,501 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-11-02 20:59:07,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:59:07,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-11-02 20:59:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:07,503 INFO L225 Difference]: With dead ends: 47 [2022-11-02 20:59:07,503 INFO L226 Difference]: Without dead ends: 37 [2022-11-02 20:59:07,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:59:07,505 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:07,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 61 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-02 20:59:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-11-02 20:59:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 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 20:59:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-11-02 20:59:07,514 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 19 [2022-11-02 20:59:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:07,515 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-11-02 20:59:07,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 20:59:07,515 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-11-02 20:59:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-02 20:59:07,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:07,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:07,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:59:07,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:07,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1782670069, now seen corresponding path program 1 times [2022-11-02 20:59:07,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:07,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207454079] [2022-11-02 20:59:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:07,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:07,585 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 20:59:07,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:07,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207454079] [2022-11-02 20:59:07,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207454079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:07,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:07,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:59:07,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138242611] [2022-11-02 20:59:07,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:07,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:59:07,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:07,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:59:07,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:59:07,591 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 20:59:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:07,612 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2022-11-02 20:59:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:59:07,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-11-02 20:59:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:07,614 INFO L225 Difference]: With dead ends: 66 [2022-11-02 20:59:07,614 INFO L226 Difference]: Without dead ends: 49 [2022-11-02 20:59:07,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:59:07,616 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:07,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-02 20:59:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2022-11-02 20:59:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 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 20:59:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-11-02 20:59:07,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 19 [2022-11-02 20:59:07,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:07,627 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-11-02 20:59:07,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 20:59:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-11-02 20:59:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:59:07,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:07,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:07,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:59:07,629 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:07,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1545632287, now seen corresponding path program 1 times [2022-11-02 20:59:07,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:07,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521536330] [2022-11-02 20:59:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:07,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:07,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:07,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521536330] [2022-11-02 20:59:07,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521536330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:07,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:07,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:59:07,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832630423] [2022-11-02 20:59:07,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:07,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:59:07,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:07,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:59:07,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:59:07,736 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 20:59:07,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:07,764 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-11-02 20:59:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:59:07,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) Word has length 20 [2022-11-02 20:59:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:07,766 INFO L225 Difference]: With dead ends: 65 [2022-11-02 20:59:07,769 INFO L226 Difference]: Without dead ends: 37 [2022-11-02 20:59:07,769 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 20:59:07,772 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:07,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-02 20:59:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-02 20:59:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 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 20:59:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-11-02 20:59:07,791 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 20 [2022-11-02 20:59:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:07,792 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-11-02 20:59:07,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 20:59:07,794 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-11-02 20:59:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:59:07,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:07,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:07,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:59:07,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2031253980, now seen corresponding path program 1 times [2022-11-02 20:59:07,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:07,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497448513] [2022-11-02 20:59:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:07,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:59:07,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:07,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497448513] [2022-11-02 20:59:07,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497448513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:07,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:07,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:59:07,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067762860] [2022-11-02 20:59:07,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:07,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:59:07,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:07,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:59:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:59:07,959 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 20:59:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:07,974 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-11-02 20:59:07,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:59:07,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) Word has length 21 [2022-11-02 20:59:07,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:07,975 INFO L225 Difference]: With dead ends: 51 [2022-11-02 20:59:07,977 INFO L226 Difference]: Without dead ends: 33 [2022-11-02 20:59:07,978 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 20:59:07,979 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:07,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-02 20:59:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-02 20:59:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 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 20:59:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-02 20:59:07,997 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 21 [2022-11-02 20:59:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:07,997 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-02 20:59:07,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 20:59:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-02 20:59:07,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:59:07,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:07,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:08,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:59:08,000 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:08,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:08,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1130312570, now seen corresponding path program 1 times [2022-11-02 20:59:08,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:08,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164452424] [2022-11-02 20:59:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:08,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:59:08,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:08,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164452424] [2022-11-02 20:59:08,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164452424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:08,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:59:08,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:59:08,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161703350] [2022-11-02 20:59:08,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:08,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:59:08,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:08,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:59:08,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:59:08,069 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 20:59:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:08,088 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-11-02 20:59:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:59:08,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-11-02 20:59:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:08,089 INFO L225 Difference]: With dead ends: 39 [2022-11-02 20:59:08,089 INFO L226 Difference]: Without dead ends: 30 [2022-11-02 20:59:08,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:59:08,090 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:08,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 44 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-02 20:59:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-02 20:59:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 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 20:59:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-02 20:59:08,098 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2022-11-02 20:59:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:08,098 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-02 20:59:08,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 20:59:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-02 20:59:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:59:08,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:08,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:08,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:59:08,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1437483694, now seen corresponding path program 1 times [2022-11-02 20:59:08,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:08,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451714538] [2022-11-02 20:59:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:08,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:59:08,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:08,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451714538] [2022-11-02 20:59:08,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451714538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934002644] [2022-11-02 20:59:08,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:08,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:08,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:08,172 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:08,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:59:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:08,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:59:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:59:08,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:59:08,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934002644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:08,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:59:08,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-02 20:59:08,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174859054] [2022-11-02 20:59:08,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:08,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:59:08,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:08,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:59:08,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:59:08,375 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 20:59:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:08,393 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-11-02 20:59:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:59:08,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-02 20:59:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:08,394 INFO L225 Difference]: With dead ends: 37 [2022-11-02 20:59:08,394 INFO L226 Difference]: Without dead ends: 23 [2022-11-02 20:59:08,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:59:08,421 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:08,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 40 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:08,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-02 20:59:08,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-02 20:59:08,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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 20:59:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-02 20:59:08,427 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 22 [2022-11-02 20:59:08,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:08,427 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-02 20:59:08,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 20:59:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-02 20:59:08,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:59:08,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:08,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:08,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:08,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:08,630 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:08,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1965889039, now seen corresponding path program 1 times [2022-11-02 20:59:08,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:08,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939023011] [2022-11-02 20:59:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:08,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:59:08,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:08,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939023011] [2022-11-02 20:59:08,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939023011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:08,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980269221] [2022-11-02 20:59:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:08,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:08,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:08,733 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:08,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:59:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:08,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:59:08,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:08,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:59:08,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980269221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:08,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:59:08,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-02 20:59:08,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906785580] [2022-11-02 20:59:08,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:08,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:59:08,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:08,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:59:08,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:59:08,888 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 20:59:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:08,911 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-11-02 20:59:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:59:08,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-02 20:59:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:08,912 INFO L225 Difference]: With dead ends: 32 [2022-11-02 20:59:08,913 INFO L226 Difference]: Without dead ends: 24 [2022-11-02 20:59:08,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:59:08,914 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:08,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 42 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-02 20:59:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-02 20:59:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-02 20:59:08,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 22 [2022-11-02 20:59:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:08,921 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-02 20:59:08,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 20:59:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-02 20:59:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:59:08,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:08,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:08,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:09,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:09,149 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:09,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1829813877, now seen corresponding path program 1 times [2022-11-02 20:59:09,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:09,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927937942] [2022-11-02 20:59:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:09,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:09,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:09,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927937942] [2022-11-02 20:59:09,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927937942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:09,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037034052] [2022-11-02 20:59:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:09,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:09,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:09,245 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:09,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:59:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:09,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:59:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:09,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:59:09,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037034052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:59:09,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:59:09,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-02 20:59:09,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269984549] [2022-11-02 20:59:09,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:59:09,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:59:09,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:09,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:59:09,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:59:09,401 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 20:59:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:09,416 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-11-02 20:59:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:59:09,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-11-02 20:59:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:09,420 INFO L225 Difference]: With dead ends: 31 [2022-11-02 20:59:09,420 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 20:59:09,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:59:09,422 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:09,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 51 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 20:59:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-02 20:59:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 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 20:59:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-02 20:59:09,434 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2022-11-02 20:59:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:09,437 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-02 20:59:09,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 20:59:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-02 20:59:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:59:09,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:09,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:09,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:09,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:59:09,656 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:09,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1804048560, now seen corresponding path program 1 times [2022-11-02 20:59:09,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:09,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244560222] [2022-11-02 20:59:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:09,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:10,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:10,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244560222] [2022-11-02 20:59:10,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244560222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:10,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513951688] [2022-11-02 20:59:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:10,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:10,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:10,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:10,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:59:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:10,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:59:10,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:10,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:10,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513951688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:10,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:10,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2022-11-02 20:59:10,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203119275] [2022-11-02 20:59:10,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:10,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:59:10,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:59:10,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:59:10,854 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 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 20:59:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:11,408 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-11-02 20:59:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:59:11,409 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 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 20:59:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:11,409 INFO L225 Difference]: With dead ends: 77 [2022-11-02 20:59:11,409 INFO L226 Difference]: Without dead ends: 71 [2022-11-02 20:59:11,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:59:11,411 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 119 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:11,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 270 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:59:11,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-02 20:59:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2022-11-02 20:59:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 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 20:59:11,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-11-02 20:59:11,421 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 24 [2022-11-02 20:59:11,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:11,422 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-11-02 20:59:11,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 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 20:59:11,422 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-11-02 20:59:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:59:11,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:11,423 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:11,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:11,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:59:11,640 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash 571706934, now seen corresponding path program 2 times [2022-11-02 20:59:11,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:11,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760347111] [2022-11-02 20:59:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:11,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:11,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:11,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760347111] [2022-11-02 20:59:11,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760347111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:11,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504354668] [2022-11-02 20:59:11,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:59:11,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:11,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:11,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:11,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:59:11,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:59:11,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:11,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:59:11,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:11,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:12,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504354668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:12,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:12,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-02 20:59:12,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728351429] [2022-11-02 20:59:12,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:12,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:59:12,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:12,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:59:12,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:59:12,096 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 20:59:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:12,213 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-11-02 20:59:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:59:12,213 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 25 [2022-11-02 20:59:12,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:12,214 INFO L225 Difference]: With dead ends: 63 [2022-11-02 20:59:12,214 INFO L226 Difference]: Without dead ends: 53 [2022-11-02 20:59:12,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:59:12,215 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 73 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:12,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 159 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-02 20:59:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-11-02 20:59:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 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 20:59:12,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-11-02 20:59:12,227 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2022-11-02 20:59:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:12,228 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-11-02 20:59:12,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 20:59:12,228 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-11-02 20:59:12,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:59:12,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:12,229 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:12,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:12,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:59:12,448 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:12,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:12,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1510332885, now seen corresponding path program 3 times [2022-11-02 20:59:12,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:12,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902973654] [2022-11-02 20:59:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:12,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:12,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:12,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902973654] [2022-11-02 20:59:12,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902973654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:12,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656323093] [2022-11-02 20:59:12,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:59:12,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:12,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:12,544 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:12,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:59:12,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:59:12,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:12,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:59:12,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:12,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:12,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656323093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:12,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:12,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-02 20:59:12,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741300102] [2022-11-02 20:59:12,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:12,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:59:12,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:12,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:59:12,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:59:12,696 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 20:59:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:12,728 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-11-02 20:59:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:59:12,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-02 20:59:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:12,730 INFO L225 Difference]: With dead ends: 72 [2022-11-02 20:59:12,730 INFO L226 Difference]: Without dead ends: 60 [2022-11-02 20:59:12,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:59:12,732 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:12,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 99 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:12,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-02 20:59:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-11-02 20:59:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 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 20:59:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-11-02 20:59:12,752 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 25 [2022-11-02 20:59:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:12,753 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-11-02 20:59:12,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 20:59:12,753 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-11-02 20:59:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:59:12,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:12,754 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:12,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:12,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:59:12,981 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:12,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:12,981 INFO L85 PathProgramCache]: Analyzing trace with hash 595735960, now seen corresponding path program 4 times [2022-11-02 20:59:12,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:12,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487303665] [2022-11-02 20:59:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:12,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:13,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:13,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487303665] [2022-11-02 20:59:13,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487303665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:13,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575843758] [2022-11-02 20:59:13,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:59:13,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:13,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:13,065 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:13,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:59:13,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:59:13,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:13,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:59:13,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:13,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:13,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575843758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:13,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:13,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-02 20:59:13,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994523475] [2022-11-02 20:59:13,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:13,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:59:13,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:13,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:59:13,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:59:13,222 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 20:59:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:13,283 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2022-11-02 20:59:13,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:59:13,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-02 20:59:13,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:13,284 INFO L225 Difference]: With dead ends: 126 [2022-11-02 20:59:13,285 INFO L226 Difference]: Without dead ends: 94 [2022-11-02 20:59:13,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:59:13,286 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:13,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 103 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-02 20:59:13,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2022-11-02 20:59:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 0 states have call successors, (0), 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 20:59:13,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-11-02 20:59:13,317 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 25 [2022-11-02 20:59:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:13,317 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-11-02 20:59:13,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 20:59:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-11-02 20:59:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:59:13,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:13,318 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:13,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:13,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:13,532 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:13,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:13,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1299373655, now seen corresponding path program 5 times [2022-11-02 20:59:13,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:13,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3403916] [2022-11-02 20:59:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:13,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:13,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:13,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3403916] [2022-11-02 20:59:13,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3403916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:13,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382079857] [2022-11-02 20:59:13,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:59:13,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:13,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:13,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:13,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:59:13,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:59:13,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:13,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:59:13,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:13,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:14,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382079857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:14,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:14,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-02 20:59:14,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291036065] [2022-11-02 20:59:14,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:14,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:59:14,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:14,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:59:14,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:59:14,015 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 20:59:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:14,176 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-11-02 20:59:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:59:14,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 25 [2022-11-02 20:59:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:14,177 INFO L225 Difference]: With dead ends: 90 [2022-11-02 20:59:14,177 INFO L226 Difference]: Without dead ends: 78 [2022-11-02 20:59:14,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:59:14,181 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:14,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 184 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:59:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-02 20:59:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2022-11-02 20:59:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 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 20:59:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-11-02 20:59:14,210 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 25 [2022-11-02 20:59:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:14,211 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-11-02 20:59:14,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 20:59:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-11-02 20:59:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:59:14,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:14,216 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:14,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:14,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:59:14,436 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:14,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:14,437 INFO L85 PathProgramCache]: Analyzing trace with hash -120572194, now seen corresponding path program 6 times [2022-11-02 20:59:14,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:14,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051339753] [2022-11-02 20:59:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:14,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:59:14,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:14,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051339753] [2022-11-02 20:59:14,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051339753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:14,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703761500] [2022-11-02 20:59:14,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:59:14,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:14,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:14,605 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:14,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:59:14,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-02 20:59:14,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:14,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:59:14,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:14,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:14,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703761500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:14,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:14,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-11-02 20:59:14,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837058774] [2022-11-02 20:59:14,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:14,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:59:14,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:14,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:59:14,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:59:14,851 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 20:59:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:15,059 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2022-11-02 20:59:15,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:59:15,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 26 [2022-11-02 20:59:15,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:15,062 INFO L225 Difference]: With dead ends: 104 [2022-11-02 20:59:15,062 INFO L226 Difference]: Without dead ends: 79 [2022-11-02 20:59:15,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:59:15,063 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:15,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 103 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:15,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-02 20:59:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2022-11-02 20:59:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 66 states have internal predecessors, (82), 0 states have call successors, (0), 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 20:59:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2022-11-02 20:59:15,107 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 26 [2022-11-02 20:59:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:15,107 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2022-11-02 20:59:15,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 20:59:15,108 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2022-11-02 20:59:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:59:15,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:15,109 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:15,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:15,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:15,325 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2006452209, now seen corresponding path program 7 times [2022-11-02 20:59:15,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:15,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112917787] [2022-11-02 20:59:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:15,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:15,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:15,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112917787] [2022-11-02 20:59:15,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112917787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:15,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954985319] [2022-11-02 20:59:15,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:59:15,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:15,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:15,669 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:15,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:59:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:59:15,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:16,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:16,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954985319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:16,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:16,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 26 [2022-11-02 20:59:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833546269] [2022-11-02 20:59:16,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:16,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:59:16,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:16,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:59:16,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:59:16,304 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 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 20:59:16,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:16,994 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2022-11-02 20:59:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:59:16,995 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 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 26 [2022-11-02 20:59:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:16,996 INFO L225 Difference]: With dead ends: 159 [2022-11-02 20:59:16,996 INFO L226 Difference]: Without dead ends: 150 [2022-11-02 20:59:16,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:59:16,998 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 145 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:16,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 524 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:59:16,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-02 20:59:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2022-11-02 20:59:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 87 states have internal predecessors, (109), 0 states have call successors, (0), 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 20:59:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-11-02 20:59:17,028 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 26 [2022-11-02 20:59:17,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:17,028 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-11-02 20:59:17,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 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 20:59:17,028 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-11-02 20:59:17,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:59:17,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:17,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:17,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:17,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:59:17,253 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:17,253 INFO L85 PathProgramCache]: Analyzing trace with hash -216163038, now seen corresponding path program 8 times [2022-11-02 20:59:17,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:17,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151734616] [2022-11-02 20:59:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:17,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:59:17,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:17,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151734616] [2022-11-02 20:59:17,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151734616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:17,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519646821] [2022-11-02 20:59:17,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:59:17,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:17,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:17,421 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:17,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:59:17,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:59:17,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:17,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:59:17,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:17,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:17,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519646821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:17,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:17,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-11-02 20:59:17,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851747835] [2022-11-02 20:59:17,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:17,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:59:17,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:59:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:59:17,669 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 20:59:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:17,849 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2022-11-02 20:59:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:59:17,849 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2022-11-02 20:59:17,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:17,850 INFO L225 Difference]: With dead ends: 107 [2022-11-02 20:59:17,850 INFO L226 Difference]: Without dead ends: 92 [2022-11-02 20:59:17,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:59:17,851 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 120 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:17,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 256 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:59:17,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-02 20:59:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2022-11-02 20:59:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 0 states have call successors, (0), 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 20:59:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-11-02 20:59:17,885 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 26 [2022-11-02 20:59:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:17,886 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-11-02 20:59:17,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 20:59:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-11-02 20:59:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:59:17,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:17,887 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:17,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:18,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:59:18,104 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:18,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1407838889, now seen corresponding path program 9 times [2022-11-02 20:59:18,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:18,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020035615] [2022-11-02 20:59:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:18,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:18,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:18,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020035615] [2022-11-02 20:59:18,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020035615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:18,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937241915] [2022-11-02 20:59:18,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:59:18,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:18,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:18,306 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:18,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:59:18,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:59:18,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:18,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:59:18,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:18,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:18,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937241915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:18,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:18,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-02 20:59:18,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650083332] [2022-11-02 20:59:18,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:18,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:59:18,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:18,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:59:18,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:59:18,734 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 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 20:59:19,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:19,177 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2022-11-02 20:59:19,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:59:19,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 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 27 [2022-11-02 20:59:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:19,178 INFO L225 Difference]: With dead ends: 131 [2022-11-02 20:59:19,178 INFO L226 Difference]: Without dead ends: 107 [2022-11-02 20:59:19,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:59:19,180 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 196 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:19,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 275 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:59:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-02 20:59:19,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2022-11-02 20:59:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 82 states have internal predecessors, (101), 0 states have call successors, (0), 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 20:59:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2022-11-02 20:59:19,228 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 27 [2022-11-02 20:59:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:19,228 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2022-11-02 20:59:19,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 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 20:59:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2022-11-02 20:59:19,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:59:19,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:19,229 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:19,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:19,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:19,444 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:19,445 INFO L85 PathProgramCache]: Analyzing trace with hash -325007018, now seen corresponding path program 10 times [2022-11-02 20:59:19,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:19,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173390752] [2022-11-02 20:59:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:19,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:19,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:19,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173390752] [2022-11-02 20:59:19,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173390752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:19,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494842983] [2022-11-02 20:59:19,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:59:19,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:19,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:19,633 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:19,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:59:19,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:59:19,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:19,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:59:19,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:19,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:20,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494842983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:20,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:20,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-02 20:59:20,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618616262] [2022-11-02 20:59:20,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:20,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:59:20,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:20,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:59:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:59:20,030 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 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 20:59:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:20,420 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2022-11-02 20:59:20,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:59:20,421 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 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 27 [2022-11-02 20:59:20,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:20,422 INFO L225 Difference]: With dead ends: 121 [2022-11-02 20:59:20,422 INFO L226 Difference]: Without dead ends: 109 [2022-11-02 20:59:20,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:59:20,424 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 190 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:20,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 488 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:59:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-02 20:59:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2022-11-02 20:59:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 states have internal predecessors, (103), 0 states have call successors, (0), 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 20:59:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-11-02 20:59:20,469 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 27 [2022-11-02 20:59:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:20,469 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-11-02 20:59:20,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 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 20:59:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-11-02 20:59:20,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:59:20,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:20,470 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:20,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:20,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:20,684 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:20,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:20,685 INFO L85 PathProgramCache]: Analyzing trace with hash 480362644, now seen corresponding path program 11 times [2022-11-02 20:59:20,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:20,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224607287] [2022-11-02 20:59:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:20,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:59:20,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:20,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224607287] [2022-11-02 20:59:20,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224607287] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:20,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054890550] [2022-11-02 20:59:20,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:59:20,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:20,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:20,760 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:20,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:59:20,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:59:20,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:20,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:59:20,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:59:20,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:59:20,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054890550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:20,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:20,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-02 20:59:20,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046033651] [2022-11-02 20:59:20,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:20,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:59:20,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:20,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:59:20,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:59:20,908 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 20:59:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:20,987 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-11-02 20:59:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:59:20,988 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 27 [2022-11-02 20:59:20,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:20,989 INFO L225 Difference]: With dead ends: 110 [2022-11-02 20:59:20,989 INFO L226 Difference]: Without dead ends: 77 [2022-11-02 20:59:20,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:59:20,990 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 77 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:20,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 175 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:20,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-02 20:59:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2022-11-02 20:59:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 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 20:59:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-11-02 20:59:21,021 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 27 [2022-11-02 20:59:21,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:21,021 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-11-02 20:59:21,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 20:59:21,021 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-11-02 20:59:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:59:21,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:21,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:21,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:21,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:21,237 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:21,237 INFO L85 PathProgramCache]: Analyzing trace with hash 400247189, now seen corresponding path program 12 times [2022-11-02 20:59:21,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:21,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027441239] [2022-11-02 20:59:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:21,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:59:21,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:21,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027441239] [2022-11-02 20:59:21,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027441239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:21,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953229670] [2022-11-02 20:59:21,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:59:21,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:21,332 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:21,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:59:21,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-02 20:59:21,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:21,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:59:21,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:59:21,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:59:21,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953229670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:21,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:21,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-02 20:59:21,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354310706] [2022-11-02 20:59:21,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:21,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:59:21,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:21,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:59:21,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:59:21,489 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 20:59:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:21,555 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2022-11-02 20:59:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:59:21,556 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 27 [2022-11-02 20:59:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:21,557 INFO L225 Difference]: With dead ends: 84 [2022-11-02 20:59:21,557 INFO L226 Difference]: Without dead ends: 78 [2022-11-02 20:59:21,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:59:21,559 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:21,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 109 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:21,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-02 20:59:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-11-02 20:59:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 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 20:59:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-11-02 20:59:21,593 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 27 [2022-11-02 20:59:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:21,594 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-11-02 20:59:21,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 20:59:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-11-02 20:59:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:59:21,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:21,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:21,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:21,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:21,808 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:21,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:21,809 INFO L85 PathProgramCache]: Analyzing trace with hash -822645520, now seen corresponding path program 13 times [2022-11-02 20:59:21,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:21,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880575537] [2022-11-02 20:59:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:21,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:22,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:22,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880575537] [2022-11-02 20:59:22,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880575537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622942011] [2022-11-02 20:59:22,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:59:22,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:22,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:22,165 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:22,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:59:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:22,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:59:22,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:22,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:22,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622942011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:22,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:22,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 29 [2022-11-02 20:59:22,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991413542] [2022-11-02 20:59:22,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:22,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:59:22,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:22,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:59:22,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:59:22,781 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 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 20:59:23,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:23,644 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2022-11-02 20:59:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:59:23,645 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 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 28 [2022-11-02 20:59:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:23,646 INFO L225 Difference]: With dead ends: 149 [2022-11-02 20:59:23,646 INFO L226 Difference]: Without dead ends: 140 [2022-11-02 20:59:23,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:59:23,648 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 142 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:23,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 978 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:59:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-02 20:59:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 81. [2022-11-02 20:59:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2) internal successors, (96), 80 states have internal predecessors, (96), 0 states have call successors, (0), 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 20:59:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-11-02 20:59:23,705 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 28 [2022-11-02 20:59:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:23,705 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-11-02 20:59:23,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 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 20:59:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-11-02 20:59:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:59:23,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:23,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:23,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:23,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:59:23,920 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1124024368, now seen corresponding path program 14 times [2022-11-02 20:59:23,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:23,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484549252] [2022-11-02 20:59:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:23,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:24,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:24,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484549252] [2022-11-02 20:59:24,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484549252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:24,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239601786] [2022-11-02 20:59:24,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:59:24,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:24,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:24,254 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:24,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:59:24,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:59:24,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:24,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:59:24,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:24,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:24,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239601786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:24,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:24,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-11-02 20:59:24,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007814130] [2022-11-02 20:59:24,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:24,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:59:24,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:24,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:59:24,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:59:24,836 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 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 20:59:25,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:25,443 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2022-11-02 20:59:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:59:25,443 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 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 28 [2022-11-02 20:59:25,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:25,444 INFO L225 Difference]: With dead ends: 118 [2022-11-02 20:59:25,444 INFO L226 Difference]: Without dead ends: 112 [2022-11-02 20:59:25,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:59:25,445 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 96 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:25,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 419 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:59:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-02 20:59:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2022-11-02 20:59:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2) internal successors, (108), 90 states have internal predecessors, (108), 0 states have call successors, (0), 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 20:59:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2022-11-02 20:59:25,491 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 28 [2022-11-02 20:59:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:25,491 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2022-11-02 20:59:25,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 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 20:59:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2022-11-02 20:59:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:59:25,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:25,492 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:25,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:25,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:59:25,709 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:25,709 INFO L85 PathProgramCache]: Analyzing trace with hash 930430102, now seen corresponding path program 15 times [2022-11-02 20:59:25,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:25,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32243742] [2022-11-02 20:59:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:25,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:25,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:25,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32243742] [2022-11-02 20:59:25,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32243742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:25,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495538798] [2022-11-02 20:59:25,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:59:25,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:25,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:25,921 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:25,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:59:25,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:59:25,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:25,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:59:25,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:26,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:26,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495538798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:26,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:26,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-02 20:59:26,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001183668] [2022-11-02 20:59:26,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:26,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:59:26,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:59:26,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:59:26,423 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 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 20:59:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:27,227 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2022-11-02 20:59:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:59:27,228 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-02 20:59:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:27,229 INFO L225 Difference]: With dead ends: 155 [2022-11-02 20:59:27,229 INFO L226 Difference]: Without dead ends: 129 [2022-11-02 20:59:27,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:59:27,230 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 438 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:27,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 479 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:59:27,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-02 20:59:27,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2022-11-02 20:59:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 93 states have internal predecessors, (113), 0 states have call successors, (0), 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 20:59:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2022-11-02 20:59:27,292 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 29 [2022-11-02 20:59:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:27,292 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2022-11-02 20:59:27,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 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 20:59:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2022-11-02 20:59:27,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:59:27,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:27,293 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:27,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:27,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 20:59:27,504 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:27,505 INFO L85 PathProgramCache]: Analyzing trace with hash 138479735, now seen corresponding path program 16 times [2022-11-02 20:59:27,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:27,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832180253] [2022-11-02 20:59:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:27,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:27,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:27,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832180253] [2022-11-02 20:59:27,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832180253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:27,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186746492] [2022-11-02 20:59:27,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:59:27,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:27,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:27,714 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:27,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:59:27,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:59:27,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:27,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:59:27,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:28,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:28,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186746492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:28,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:28,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-02 20:59:28,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406905633] [2022-11-02 20:59:28,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:28,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:59:28,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:28,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:59:28,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:59:28,257 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 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 20:59:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:28,847 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2022-11-02 20:59:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:59:28,848 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-02 20:59:28,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:28,849 INFO L225 Difference]: With dead ends: 144 [2022-11-02 20:59:28,849 INFO L226 Difference]: Without dead ends: 131 [2022-11-02 20:59:28,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:59:28,850 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 371 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:28,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 881 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:59:28,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-02 20:59:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2022-11-02 20:59:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 95 states have internal predecessors, (115), 0 states have call successors, (0), 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 20:59:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2022-11-02 20:59:28,907 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 29 [2022-11-02 20:59:28,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:28,907 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2022-11-02 20:59:28,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 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 20:59:28,908 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2022-11-02 20:59:28,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:59:28,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:28,908 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:28,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:29,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:59:29,109 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:29,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2086280437, now seen corresponding path program 17 times [2022-11-02 20:59:29,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:29,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252131485] [2022-11-02 20:59:29,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:29,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:59:29,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:29,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252131485] [2022-11-02 20:59:29,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252131485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:29,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606948629] [2022-11-02 20:59:29,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:59:29,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:29,188 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:29,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:59:29,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:59:29,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:29,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:59:29,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:59:29,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:59:29,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606948629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:29,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:29,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-02 20:59:29,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640011433] [2022-11-02 20:59:29,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:29,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:59:29,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:29,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:59:29,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:59:29,356 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:29,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:29,495 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2022-11-02 20:59:29,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:59:29,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-02 20:59:29,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:29,497 INFO L225 Difference]: With dead ends: 139 [2022-11-02 20:59:29,497 INFO L226 Difference]: Without dead ends: 126 [2022-11-02 20:59:29,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:59:29,498 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:29,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 175 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-02 20:59:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2022-11-02 20:59:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2252252252252251) internal successors, (136), 111 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 20:59:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2022-11-02 20:59:29,565 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 29 [2022-11-02 20:59:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:29,566 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2022-11-02 20:59:29,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2022-11-02 20:59:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:59:29,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:29,567 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:29,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:29,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:59:29,788 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:29,789 INFO L85 PathProgramCache]: Analyzing trace with hash -397298668, now seen corresponding path program 18 times [2022-11-02 20:59:29,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:29,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367194101] [2022-11-02 20:59:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:29,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:59:29,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:29,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367194101] [2022-11-02 20:59:29,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367194101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:29,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995443026] [2022-11-02 20:59:29,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:59:29,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:29,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:29,893 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:29,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:59:29,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 20:59:29,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:29,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:59:29,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:59:30,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:59:30,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995443026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:30,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:30,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-02 20:59:30,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52776395] [2022-11-02 20:59:30,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:30,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:59:30,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:30,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:59:30,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:59:30,049 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:30,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:30,213 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2022-11-02 20:59:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:59:30,213 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-02 20:59:30,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:30,214 INFO L225 Difference]: With dead ends: 262 [2022-11-02 20:59:30,215 INFO L226 Difference]: Without dead ends: 202 [2022-11-02 20:59:30,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:59:30,216 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 105 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:30,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 207 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:30,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-02 20:59:30,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 134. [2022-11-02 20:59:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.2255639097744362) internal successors, (163), 133 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 20:59:30,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2022-11-02 20:59:30,298 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 29 [2022-11-02 20:59:30,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:30,299 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2022-11-02 20:59:30,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:30,299 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2022-11-02 20:59:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:59:30,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:30,300 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:30,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:30,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-02 20:59:30,515 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:30,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:30,516 INFO L85 PathProgramCache]: Analyzing trace with hash 660541935, now seen corresponding path program 19 times [2022-11-02 20:59:30,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:30,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025729135] [2022-11-02 20:59:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:30,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:30,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:30,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025729135] [2022-11-02 20:59:30,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025729135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:30,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070933099] [2022-11-02 20:59:30,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:59:30,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:30,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:30,961 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:30,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:59:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:31,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:59:31,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:31,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:31,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070933099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:31,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:31,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 32 [2022-11-02 20:59:31,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711878355] [2022-11-02 20:59:31,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:31,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 20:59:31,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:31,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 20:59:31,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=914, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:59:31,652 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 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 20:59:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:32,722 INFO L93 Difference]: Finished difference Result 258 states and 295 transitions. [2022-11-02 20:59:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:59:32,723 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2022-11-02 20:59:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:32,724 INFO L225 Difference]: With dead ends: 258 [2022-11-02 20:59:32,724 INFO L226 Difference]: Without dead ends: 249 [2022-11-02 20:59:32,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=2305, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 20:59:32,726 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 167 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:32,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1417 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:59:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-02 20:59:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2022-11-02 20:59:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 142 states have internal predecessors, (173), 0 states have call successors, (0), 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 20:59:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2022-11-02 20:59:32,802 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 30 [2022-11-02 20:59:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:32,803 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2022-11-02 20:59:32,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 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 20:59:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2022-11-02 20:59:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:59:32,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:32,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:32,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-02 20:59:33,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-02 20:59:33,012 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash 283195298, now seen corresponding path program 20 times [2022-11-02 20:59:33,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:33,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368912805] [2022-11-02 20:59:33,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:33,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:59:33,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:33,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368912805] [2022-11-02 20:59:33,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368912805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:33,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081731622] [2022-11-02 20:59:33,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:59:33,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:33,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:33,175 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:33,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:59:33,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:59:33,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:33,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:59:33,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:59:33,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:59:33,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081731622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:33,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:33,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-11-02 20:59:33,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618565538] [2022-11-02 20:59:33,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:33,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:59:33,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:59:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:59:33,555 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 20:59:34,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:34,098 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2022-11-02 20:59:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:59:34,098 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 30 [2022-11-02 20:59:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:34,100 INFO L225 Difference]: With dead ends: 217 [2022-11-02 20:59:34,100 INFO L226 Difference]: Without dead ends: 181 [2022-11-02 20:59:34,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:59:34,101 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 253 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:34,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 317 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:59:34,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-02 20:59:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2022-11-02 20:59:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.196078431372549) internal successors, (183), 153 states have internal predecessors, (183), 0 states have call successors, (0), 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 20:59:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2022-11-02 20:59:34,173 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 30 [2022-11-02 20:59:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:34,173 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2022-11-02 20:59:34,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 20:59:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2022-11-02 20:59:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:59:34,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:34,174 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:34,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-02 20:59:34,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:34,386 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:34,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1226887537, now seen corresponding path program 21 times [2022-11-02 20:59:34,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:34,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767363403] [2022-11-02 20:59:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:34,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:34,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:34,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767363403] [2022-11-02 20:59:34,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767363403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:34,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006218636] [2022-11-02 20:59:34,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:59:34,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:34,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:34,740 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:34,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:59:34,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:59:34,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:34,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:59:34,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:35,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:35,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006218636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:35,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:35,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-11-02 20:59:35,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829612954] [2022-11-02 20:59:35,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:35,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:59:35,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:35,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:59:35,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:59:35,379 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 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 20:59:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:36,211 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2022-11-02 20:59:36,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:59:36,212 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 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) Word has length 30 [2022-11-02 20:59:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:36,213 INFO L225 Difference]: With dead ends: 226 [2022-11-02 20:59:36,213 INFO L226 Difference]: Without dead ends: 204 [2022-11-02 20:59:36,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:59:36,215 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 109 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:36,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 778 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:59:36,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-02 20:59:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2022-11-02 20:59:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 152 states have internal predecessors, (183), 0 states have call successors, (0), 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 20:59:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 183 transitions. [2022-11-02 20:59:36,301 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 183 transitions. Word has length 30 [2022-11-02 20:59:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:36,302 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 183 transitions. [2022-11-02 20:59:36,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 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 20:59:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 183 transitions. [2022-11-02 20:59:36,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:59:36,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:36,303 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:36,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:36,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:36,508 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:36,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:36,509 INFO L85 PathProgramCache]: Analyzing trace with hash 628770462, now seen corresponding path program 22 times [2022-11-02 20:59:36,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:36,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208699822] [2022-11-02 20:59:36,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:36,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:59:36,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:36,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208699822] [2022-11-02 20:59:36,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208699822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:36,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892998726] [2022-11-02 20:59:36,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:59:36,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:36,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:36,677 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:36,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 20:59:36,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:59:36,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:36,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:59:36,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:59:36,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:59:37,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892998726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:37,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:37,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-11-02 20:59:37,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774103021] [2022-11-02 20:59:37,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:37,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:59:37,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:37,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:59:37,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:59:37,066 INFO L87 Difference]: Start difference. First operand 153 states and 183 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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 20:59:37,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:37,476 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2022-11-02 20:59:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:59:37,477 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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 30 [2022-11-02 20:59:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:37,478 INFO L225 Difference]: With dead ends: 186 [2022-11-02 20:59:37,478 INFO L226 Difference]: Without dead ends: 167 [2022-11-02 20:59:37,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:59:37,479 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 272 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:37,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 493 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:59:37,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-02 20:59:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2022-11-02 20:59:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 152 states have internal predecessors, (179), 0 states have call successors, (0), 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 20:59:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 179 transitions. [2022-11-02 20:59:37,565 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 179 transitions. Word has length 30 [2022-11-02 20:59:37,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:37,565 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 179 transitions. [2022-11-02 20:59:37,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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 20:59:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 179 transitions. [2022-11-02 20:59:37,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-02 20:59:37,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:37,566 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:37,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-02 20:59:37,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-02 20:59:37,774 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:37,775 INFO L85 PathProgramCache]: Analyzing trace with hash -335399049, now seen corresponding path program 23 times [2022-11-02 20:59:37,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:37,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873990550] [2022-11-02 20:59:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:37,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:37,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:37,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873990550] [2022-11-02 20:59:37,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873990550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:37,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503914621] [2022-11-02 20:59:37,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:59:37,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:37,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:37,992 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:37,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-02 20:59:38,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 20:59:38,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:38,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:59:38,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:38,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:38,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503914621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:38,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:38,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-11-02 20:59:38,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329488335] [2022-11-02 20:59:38,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:38,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:59:38,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:38,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:59:38,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:59:38,588 INFO L87 Difference]: Start difference. First operand 153 states and 179 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 20:59:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:39,922 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2022-11-02 20:59:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:59:39,922 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 31 [2022-11-02 20:59:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:39,924 INFO L225 Difference]: With dead ends: 263 [2022-11-02 20:59:39,924 INFO L226 Difference]: Without dead ends: 233 [2022-11-02 20:59:39,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=617, Invalid=2245, Unknown=0, NotChecked=0, Total=2862 [2022-11-02 20:59:39,925 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 608 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:39,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 636 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:59:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-02 20:59:40,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 168. [2022-11-02 20:59:40,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1796407185628743) internal successors, (197), 167 states have internal predecessors, (197), 0 states have call successors, (0), 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 20:59:40,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2022-11-02 20:59:40,010 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 31 [2022-11-02 20:59:40,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:40,011 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2022-11-02 20:59:40,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 20:59:40,011 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2022-11-02 20:59:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-02 20:59:40,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:40,011 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:40,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:40,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-02 20:59:40,212 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:40,212 INFO L85 PathProgramCache]: Analyzing trace with hash 883943350, now seen corresponding path program 24 times [2022-11-02 20:59:40,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:40,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101623813] [2022-11-02 20:59:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:40,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:40,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:40,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101623813] [2022-11-02 20:59:40,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101623813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:40,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286586963] [2022-11-02 20:59:40,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:59:40,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:40,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:40,469 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:40,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-02 20:59:40,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 20:59:40,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:40,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:59:40,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:40,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:41,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286586963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:41,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:41,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-11-02 20:59:41,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305393356] [2022-11-02 20:59:41,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:41,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:59:41,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:41,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:59:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:59:41,140 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 20:59:42,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:42,055 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2022-11-02 20:59:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:59:42,056 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 31 [2022-11-02 20:59:42,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:42,058 INFO L225 Difference]: With dead ends: 251 [2022-11-02 20:59:42,058 INFO L226 Difference]: Without dead ends: 236 [2022-11-02 20:59:42,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:59:42,059 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 514 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:42,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 1166 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:59:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-02 20:59:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2022-11-02 20:59:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1764705882352942) internal successors, (200), 170 states have internal predecessors, (200), 0 states have call successors, (0), 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 20:59:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2022-11-02 20:59:42,156 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 31 [2022-11-02 20:59:42,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:42,157 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2022-11-02 20:59:42,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 20:59:42,157 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2022-11-02 20:59:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-02 20:59:42,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:42,158 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:42,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:42,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-02 20:59:42,367 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:42,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:42,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2026567256, now seen corresponding path program 25 times [2022-11-02 20:59:42,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:42,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039314992] [2022-11-02 20:59:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:42,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:59:42,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:42,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039314992] [2022-11-02 20:59:42,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039314992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:42,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145810422] [2022-11-02 20:59:42,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:59:42,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:42,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:42,456 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:42,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-02 20:59:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:42,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:59:42,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:59:42,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:59:42,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145810422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:42,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:42,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-02 20:59:42,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566166305] [2022-11-02 20:59:42,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:42,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:59:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:59:42,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:59:42,629 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:42,869 INFO L93 Difference]: Finished difference Result 227 states and 261 transitions. [2022-11-02 20:59:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:59:42,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-02 20:59:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:42,871 INFO L225 Difference]: With dead ends: 227 [2022-11-02 20:59:42,871 INFO L226 Difference]: Without dead ends: 171 [2022-11-02 20:59:42,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:59:42,872 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 91 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:42,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 279 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:59:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-02 20:59:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2022-11-02 20:59:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1666666666666667) internal successors, (182), 156 states have internal predecessors, (182), 0 states have call successors, (0), 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 20:59:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2022-11-02 20:59:43,007 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 31 [2022-11-02 20:59:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:43,007 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2022-11-02 20:59:43,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2022-11-02 20:59:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-02 20:59:43,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:43,008 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:43,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:43,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-02 20:59:43,236 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1679203531, now seen corresponding path program 26 times [2022-11-02 20:59:43,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:43,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378177629] [2022-11-02 20:59:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:43,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:59:43,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:43,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378177629] [2022-11-02 20:59:43,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378177629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:43,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098019142] [2022-11-02 20:59:43,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:59:43,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:43,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:43,325 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:43,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-02 20:59:43,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:59:43,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:43,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:59:43,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:59:43,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:59:43,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098019142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:43,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:43,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-02 20:59:43,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36413224] [2022-11-02 20:59:43,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:43,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:59:43,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:43,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:59:43,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:59:43,524 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:43,725 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2022-11-02 20:59:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:59:43,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-02 20:59:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:43,727 INFO L225 Difference]: With dead ends: 178 [2022-11-02 20:59:43,727 INFO L226 Difference]: Without dead ends: 172 [2022-11-02 20:59:43,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:59:43,728 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:43,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 226 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-02 20:59:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2022-11-02 20:59:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 0 states have call successors, (0), 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 20:59:43,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2022-11-02 20:59:43,821 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 31 [2022-11-02 20:59:43,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:43,821 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2022-11-02 20:59:43,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:59:43,822 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2022-11-02 20:59:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:59:43,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:43,822 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:43,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-02 20:59:44,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-02 20:59:44,023 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:44,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1999889776, now seen corresponding path program 27 times [2022-11-02 20:59:44,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:44,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535789406] [2022-11-02 20:59:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:44,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:44,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:44,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535789406] [2022-11-02 20:59:44,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535789406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:44,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184679532] [2022-11-02 20:59:44,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:59:44,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:44,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:44,459 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:44,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-02 20:59:44,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:59:44,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:44,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 20:59:44,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:44,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:59:45,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184679532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:45,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:45,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2022-11-02 20:59:45,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899760954] [2022-11-02 20:59:45,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:45,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:59:45,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:45,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:59:45,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:59:45,176 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 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 20:59:46,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:46,529 INFO L93 Difference]: Finished difference Result 305 states and 337 transitions. [2022-11-02 20:59:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:59:46,530 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 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 32 [2022-11-02 20:59:46,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:46,531 INFO L225 Difference]: With dead ends: 305 [2022-11-02 20:59:46,531 INFO L226 Difference]: Without dead ends: 296 [2022-11-02 20:59:46,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=2816, Unknown=0, NotChecked=0, Total=3080 [2022-11-02 20:59:46,533 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 191 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1924 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:46,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1924 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:59:46,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-02 20:59:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 167. [2022-11-02 20:59:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 166 states have internal predecessors, (193), 0 states have call successors, (0), 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 20:59:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2022-11-02 20:59:46,674 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 32 [2022-11-02 20:59:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:46,675 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2022-11-02 20:59:46,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 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 20:59:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2022-11-02 20:59:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:59:46,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:46,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:46,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-02 20:59:46,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:46,884 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:46,885 INFO L85 PathProgramCache]: Analyzing trace with hash -120192688, now seen corresponding path program 28 times [2022-11-02 20:59:46,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:46,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95364989] [2022-11-02 20:59:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:46,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:47,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95364989] [2022-11-02 20:59:47,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95364989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780445157] [2022-11-02 20:59:47,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:59:47,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:47,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:47,286 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:47,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-02 20:59:47,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:59:47,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:47,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:59:47,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:47,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:59:48,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780445157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:48,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:48,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 33 [2022-11-02 20:59:48,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908135664] [2022-11-02 20:59:48,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:48,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:59:48,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:48,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:59:48,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:59:48,009 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 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 20:59:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:49,016 INFO L93 Difference]: Finished difference Result 223 states and 248 transitions. [2022-11-02 20:59:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:59:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 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 32 [2022-11-02 20:59:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:49,018 INFO L225 Difference]: With dead ends: 223 [2022-11-02 20:59:49,018 INFO L226 Difference]: Without dead ends: 200 [2022-11-02 20:59:49,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 20:59:49,019 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 111 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:49,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1135 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:59:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-02 20:59:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2022-11-02 20:59:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 0 states have call successors, (0), 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 20:59:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2022-11-02 20:59:49,109 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 32 [2022-11-02 20:59:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:49,109 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2022-11-02 20:59:49,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 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 20:59:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2022-11-02 20:59:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:59:49,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:49,111 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:49,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:49,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:49,324 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1085561488, now seen corresponding path program 29 times [2022-11-02 20:59:49,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:49,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38342478] [2022-11-02 20:59:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:49,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:59:49,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:49,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38342478] [2022-11-02 20:59:49,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38342478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:49,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872302303] [2022-11-02 20:59:49,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:59:49,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:49,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:49,705 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:49,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-02 20:59:49,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:59:49,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:49,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:59:49,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:59:50,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:59:50,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872302303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:50,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:50,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-11-02 20:59:50,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666431179] [2022-11-02 20:59:50,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:50,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:59:50,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:50,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:59:50,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:59:50,446 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 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 20:59:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:51,252 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2022-11-02 20:59:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:59:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 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 32 [2022-11-02 20:59:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:51,253 INFO L225 Difference]: With dead ends: 198 [2022-11-02 20:59:51,253 INFO L226 Difference]: Without dead ends: 192 [2022-11-02 20:59:51,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 20:59:51,254 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 111 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:51,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 429 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:59:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-02 20:59:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2022-11-02 20:59:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.1666666666666667) internal successors, (196), 168 states have internal predecessors, (196), 0 states have call successors, (0), 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 20:59:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2022-11-02 20:59:51,379 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 32 [2022-11-02 20:59:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:51,380 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2022-11-02 20:59:51,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 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 20:59:51,380 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2022-11-02 20:59:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 20:59:51,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:51,381 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:51,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-02 20:59:51,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-02 20:59:51,594 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:51,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1204403466, now seen corresponding path program 30 times [2022-11-02 20:59:51,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:51,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297555447] [2022-11-02 20:59:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:51,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:51,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:51,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297555447] [2022-11-02 20:59:51,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297555447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:51,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507762804] [2022-11-02 20:59:51,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:59:51,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:51,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:51,897 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:51,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-02 20:59:51,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 20:59:51,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:51,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:59:51,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:52,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:52,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507762804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:52,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:52,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-11-02 20:59:52,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749360317] [2022-11-02 20:59:52,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:52,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:59:52,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:52,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:59:52,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:59:52,696 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 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 20:59:54,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:54,817 INFO L93 Difference]: Finished difference Result 299 states and 335 transitions. [2022-11-02 20:59:54,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 20:59:54,818 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 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 33 [2022-11-02 20:59:54,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:54,819 INFO L225 Difference]: With dead ends: 299 [2022-11-02 20:59:54,819 INFO L226 Difference]: Without dead ends: 267 [2022-11-02 20:59:54,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=964, Invalid=3592, Unknown=0, NotChecked=0, Total=4556 [2022-11-02 20:59:54,821 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 975 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:54,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 866 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:59:54,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-02 20:59:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 185. [2022-11-02 20:59:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1684782608695652) internal successors, (215), 184 states have internal predecessors, (215), 0 states have call successors, (0), 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 20:59:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2022-11-02 20:59:54,984 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 33 [2022-11-02 20:59:54,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:54,984 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2022-11-02 20:59:54,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 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 20:59:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2022-11-02 20:59:54,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 20:59:54,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:54,986 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:55,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-02 20:59:55,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-02 20:59:55,200 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:55,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2059494761, now seen corresponding path program 31 times [2022-11-02 20:59:55,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:55,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110881291] [2022-11-02 20:59:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:55,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110881291] [2022-11-02 20:59:55,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110881291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:55,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701996404] [2022-11-02 20:59:55,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:59:55,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:55,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:55,489 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:55,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-02 20:59:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:55,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:59:55,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:55,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:59:56,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701996404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:56,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:56,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-11-02 20:59:56,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460435099] [2022-11-02 20:59:56,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:56,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:59:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:56,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:59:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:59:56,328 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 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 20:59:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:57,663 INFO L93 Difference]: Finished difference Result 286 states and 319 transitions. [2022-11-02 20:59:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:59:57,663 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 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 33 [2022-11-02 20:59:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:57,665 INFO L225 Difference]: With dead ends: 286 [2022-11-02 20:59:57,665 INFO L226 Difference]: Without dead ends: 270 [2022-11-02 20:59:57,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:59:57,666 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 752 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:57,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 1665 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:59:57,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-02 20:59:57,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2022-11-02 20:59:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 187 states have internal predecessors, (218), 0 states have call successors, (0), 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 20:59:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2022-11-02 20:59:57,788 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 33 [2022-11-02 20:59:57,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:57,788 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2022-11-02 20:59:57,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 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 20:59:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2022-11-02 20:59:57,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 20:59:57,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:57,789 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:57,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-02 20:59:57,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:57,989 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:57,990 INFO L85 PathProgramCache]: Analyzing trace with hash 893931157, now seen corresponding path program 32 times [2022-11-02 20:59:57,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:57,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852491943] [2022-11-02 20:59:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:57,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:59:58,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:58,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852491943] [2022-11-02 20:59:58,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852491943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:58,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761758980] [2022-11-02 20:59:58,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:59:58,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:58,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:58,100 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:58,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-02 20:59:58,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:59:58,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:58,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:59:58,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:59:58,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:59:58,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761758980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:58,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:58,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-11-02 20:59:58,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758123765] [2022-11-02 20:59:58,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:58,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:59:58,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:58,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:59:58,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:59:58,283 INFO L87 Difference]: Start difference. First operand 188 states and 218 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 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 20:59:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:58,595 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2022-11-02 20:59:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:59:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 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 33 [2022-11-02 20:59:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:58,597 INFO L225 Difference]: With dead ends: 247 [2022-11-02 20:59:58,597 INFO L226 Difference]: Without dead ends: 233 [2022-11-02 20:59:58,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:59:58,598 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 98 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:58,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 160 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:58,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-02 20:59:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2022-11-02 20:59:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1818181818181819) internal successors, (247), 209 states have internal predecessors, (247), 0 states have call successors, (0), 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 20:59:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 247 transitions. [2022-11-02 20:59:58,730 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 247 transitions. Word has length 33 [2022-11-02 20:59:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:58,730 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 247 transitions. [2022-11-02 20:59:58,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 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 20:59:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 247 transitions. [2022-11-02 20:59:58,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 20:59:58,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:58,731 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:58,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-02 20:59:58,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-02 20:59:58,940 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:59:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:59:58,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1979153752, now seen corresponding path program 33 times [2022-11-02 20:59:58,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:59:58,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052975834] [2022-11-02 20:59:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:59:58,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:59:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:59:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:59:59,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:59:59,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052975834] [2022-11-02 20:59:59,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052975834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:59:59,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457984032] [2022-11-02 20:59:59,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:59:59,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:59:59,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:59:59,038 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:59:59,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-02 20:59:59,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:59:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:59:59,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:59:59,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:59:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:59:59,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:59:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:59:59,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457984032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:59:59,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:59:59,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-11-02 20:59:59,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632145536] [2022-11-02 20:59:59,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:59:59,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:59:59,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:59:59,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:59:59,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:59:59,245 INFO L87 Difference]: Start difference. First operand 210 states and 247 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 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 20:59:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:59:59,691 INFO L93 Difference]: Finished difference Result 443 states and 524 transitions. [2022-11-02 20:59:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:59:59,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 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 33 [2022-11-02 20:59:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:59:59,693 INFO L225 Difference]: With dead ends: 443 [2022-11-02 20:59:59,693 INFO L226 Difference]: Without dead ends: 353 [2022-11-02 20:59:59,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:59:59,694 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 222 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:59:59,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 276 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:59:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-02 20:59:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2022-11-02 20:59:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 0 states have call successors, (0), 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 20:59:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2022-11-02 20:59:59,893 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 33 [2022-11-02 20:59:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:59:59,893 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2022-11-02 20:59:59,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 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 20:59:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2022-11-02 20:59:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 20:59:59,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:59:59,895 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:59:59,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-02 21:00:00,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-02 21:00:00,119 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:00,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1242809295, now seen corresponding path program 34 times [2022-11-02 21:00:00,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:00,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607302573] [2022-11-02 21:00:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:00,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:00:00,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:00,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607302573] [2022-11-02 21:00:00,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607302573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:00,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969271212] [2022-11-02 21:00:00,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:00:00,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:00,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:00,658 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:00,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-02 21:00:00,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:00:00,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:00,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 21:00:00,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:00:01,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:00:01,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969271212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:01,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:01,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 38 [2022-11-02 21:00:01,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395672760] [2022-11-02 21:00:01,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:01,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 21:00:01,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:01,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 21:00:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1314, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 21:00:01,437 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 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 21:00:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:03,169 INFO L93 Difference]: Finished difference Result 464 states and 518 transitions. [2022-11-02 21:00:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 21:00:03,170 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 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 34 [2022-11-02 21:00:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:03,172 INFO L225 Difference]: With dead ends: 464 [2022-11-02 21:00:03,173 INFO L226 Difference]: Without dead ends: 455 [2022-11-02 21:00:03,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=283, Invalid=3377, Unknown=0, NotChecked=0, Total=3660 [2022-11-02 21:00:03,174 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 211 mSDsluCounter, 2374 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:03,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 2474 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:00:03,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-02 21:00:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 257. [2022-11-02 21:00:03,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.1796875) internal successors, (302), 256 states have internal predecessors, (302), 0 states have call successors, (0), 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 21:00:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 302 transitions. [2022-11-02 21:00:03,391 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 302 transitions. Word has length 34 [2022-11-02 21:00:03,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:03,391 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 302 transitions. [2022-11-02 21:00:03,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 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 21:00:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 302 transitions. [2022-11-02 21:00:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 21:00:03,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:03,392 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:03,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:03,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:03,593 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:03,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:03,593 INFO L85 PathProgramCache]: Analyzing trace with hash 489303023, now seen corresponding path program 35 times [2022-11-02 21:00:03,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:03,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039307028] [2022-11-02 21:00:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:03,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:00:04,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:04,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039307028] [2022-11-02 21:00:04,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039307028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:04,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008511900] [2022-11-02 21:00:04,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:00:04,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:04,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:04,056 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:04,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-02 21:00:04,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 21:00:04,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:04,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 21:00:04,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:00:04,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:00:04,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008511900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:04,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:04,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 36 [2022-11-02 21:00:04,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751702032] [2022-11-02 21:00:04,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:04,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 21:00:04,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:04,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 21:00:04,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 21:00:04,911 INFO L87 Difference]: Start difference. First operand 257 states and 302 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 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 21:00:06,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:06,259 INFO L93 Difference]: Finished difference Result 364 states and 408 transitions. [2022-11-02 21:00:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 21:00:06,259 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 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 34 [2022-11-02 21:00:06,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:06,260 INFO L225 Difference]: With dead ends: 364 [2022-11-02 21:00:06,261 INFO L226 Difference]: Without dead ends: 340 [2022-11-02 21:00:06,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=259, Invalid=2821, Unknown=0, NotChecked=0, Total=3080 [2022-11-02 21:00:06,262 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 139 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:06,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1458 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:00:06,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-02 21:00:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 248. [2022-11-02 21:00:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 0 states have call successors, (0), 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 21:00:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2022-11-02 21:00:06,422 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 34 [2022-11-02 21:00:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:06,422 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2022-11-02 21:00:06,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 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 21:00:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2022-11-02 21:00:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 21:00:06,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:06,424 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:06,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:06,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:06,652 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2122819938, now seen corresponding path program 36 times [2022-11-02 21:00:06,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:06,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915014414] [2022-11-02 21:00:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:06,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:00:06,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:06,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915014414] [2022-11-02 21:00:06,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915014414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:06,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321552837] [2022-11-02 21:00:06,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:00:06,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:06,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:06,892 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:06,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-02 21:00:06,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 21:00:06,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:06,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 21:00:06,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:00:07,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:00:07,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321552837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:07,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:07,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-11-02 21:00:07,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683508968] [2022-11-02 21:00:07,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:07,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 21:00:07,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 21:00:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-11-02 21:00:07,408 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 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 21:00:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:08,419 INFO L93 Difference]: Finished difference Result 359 states and 413 transitions. [2022-11-02 21:00:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 21:00:08,420 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 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 34 [2022-11-02 21:00:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:08,422 INFO L225 Difference]: With dead ends: 359 [2022-11-02 21:00:08,422 INFO L226 Difference]: Without dead ends: 314 [2022-11-02 21:00:08,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=405, Invalid=1401, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 21:00:08,422 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 444 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:08,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 419 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:00:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-02 21:00:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 273. [2022-11-02 21:00:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.161764705882353) internal successors, (316), 272 states have internal predecessors, (316), 0 states have call successors, (0), 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 21:00:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 316 transitions. [2022-11-02 21:00:08,697 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 316 transitions. Word has length 34 [2022-11-02 21:00:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:08,698 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 316 transitions. [2022-11-02 21:00:08,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 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 21:00:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 316 transitions. [2022-11-02 21:00:08,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 21:00:08,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:08,699 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:08,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-02 21:00:08,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:08,904 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:08,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1302431921, now seen corresponding path program 37 times [2022-11-02 21:00:08,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:08,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609097593] [2022-11-02 21:00:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:08,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:00:09,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:09,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609097593] [2022-11-02 21:00:09,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609097593] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:09,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595462084] [2022-11-02 21:00:09,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:00:09,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:09,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:09,301 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:09,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-02 21:00:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:09,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 21:00:09,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:00:09,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:00:10,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595462084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:10,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:10,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2022-11-02 21:00:10,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885702577] [2022-11-02 21:00:10,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:10,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 21:00:10,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 21:00:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 21:00:10,170 INFO L87 Difference]: Start difference. First operand 273 states and 316 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 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 21:00:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:11,329 INFO L93 Difference]: Finished difference Result 352 states and 398 transitions. [2022-11-02 21:00:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 21:00:11,330 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 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 34 [2022-11-02 21:00:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:11,331 INFO L225 Difference]: With dead ends: 352 [2022-11-02 21:00:11,331 INFO L226 Difference]: Without dead ends: 327 [2022-11-02 21:00:11,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=2399, Unknown=0, NotChecked=0, Total=2652 [2022-11-02 21:00:11,332 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 121 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:11,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 888 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:00:11,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-02 21:00:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2022-11-02 21:00:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1666666666666667) internal successors, (315), 270 states have internal predecessors, (315), 0 states have call successors, (0), 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 21:00:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 315 transitions. [2022-11-02 21:00:11,528 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 315 transitions. Word has length 34 [2022-11-02 21:00:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:11,529 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 315 transitions. [2022-11-02 21:00:11,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 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 21:00:11,529 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 315 transitions. [2022-11-02 21:00:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 21:00:11,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:11,529 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:11,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-02 21:00:11,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-02 21:00:11,730 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:11,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:11,730 INFO L85 PathProgramCache]: Analyzing trace with hash -266355998, now seen corresponding path program 38 times [2022-11-02 21:00:11,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:11,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293695138] [2022-11-02 21:00:11,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:11,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:00:11,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293695138] [2022-11-02 21:00:11,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293695138] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884500789] [2022-11-02 21:00:11,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:00:11,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:11,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:11,923 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:11,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-02 21:00:11,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:00:11,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:11,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 21:00:11,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:00:12,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:00:12,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884500789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:12,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:12,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-11-02 21:00:12,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283090762] [2022-11-02 21:00:12,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:12,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 21:00:12,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:12,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 21:00:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-11-02 21:00:12,420 INFO L87 Difference]: Start difference. First operand 271 states and 315 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 21:00:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:13,184 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2022-11-02 21:00:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:00:13,185 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 34 [2022-11-02 21:00:13,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:13,187 INFO L225 Difference]: With dead ends: 318 [2022-11-02 21:00:13,187 INFO L226 Difference]: Without dead ends: 294 [2022-11-02 21:00:13,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 21:00:13,188 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 424 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:13,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 844 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:00:13,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-02 21:00:13,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 271. [2022-11-02 21:00:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1444444444444444) internal successors, (309), 270 states have internal predecessors, (309), 0 states have call successors, (0), 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 21:00:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 309 transitions. [2022-11-02 21:00:13,426 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 309 transitions. Word has length 34 [2022-11-02 21:00:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:13,426 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 309 transitions. [2022-11-02 21:00:13,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 21:00:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 309 transitions. [2022-11-02 21:00:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 21:00:13,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:13,427 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:13,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-02 21:00:13,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-02 21:00:13,628 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash 535019927, now seen corresponding path program 39 times [2022-11-02 21:00:13,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:13,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615125982] [2022-11-02 21:00:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:13,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:13,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:13,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615125982] [2022-11-02 21:00:13,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615125982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:13,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539269890] [2022-11-02 21:00:13,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:00:13,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:13,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:13,965 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:13,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-02 21:00:14,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-02 21:00:14,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:14,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 21:00:14,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:14,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:15,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539269890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:15,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:15,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-11-02 21:00:15,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127318210] [2022-11-02 21:00:15,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:15,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 21:00:15,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:15,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 21:00:15,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 21:00:15,066 INFO L87 Difference]: Start difference. First operand 271 states and 309 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 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 21:00:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:18,174 INFO L93 Difference]: Finished difference Result 470 states and 520 transitions. [2022-11-02 21:00:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 21:00:18,175 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-02 21:00:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:18,176 INFO L225 Difference]: With dead ends: 470 [2022-11-02 21:00:18,177 INFO L226 Difference]: Without dead ends: 434 [2022-11-02 21:00:18,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1420, Invalid=5386, Unknown=0, NotChecked=0, Total=6806 [2022-11-02 21:00:18,178 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1185 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:18,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 1078 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:00:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-02 21:00:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 301. [2022-11-02 21:00:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 300 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:00:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 343 transitions. [2022-11-02 21:00:18,431 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 343 transitions. Word has length 35 [2022-11-02 21:00:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:18,432 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 343 transitions. [2022-11-02 21:00:18,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 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 21:00:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 343 transitions. [2022-11-02 21:00:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 21:00:18,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:18,434 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:18,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:18,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-02 21:00:18,656 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:18,657 INFO L85 PathProgramCache]: Analyzing trace with hash -203006442, now seen corresponding path program 40 times [2022-11-02 21:00:18,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:18,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376027871] [2022-11-02 21:00:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:18,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:19,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:19,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376027871] [2022-11-02 21:00:19,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376027871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:19,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293994301] [2022-11-02 21:00:19,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:00:19,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:19,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:19,007 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:19,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-02 21:00:19,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:00:19,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:19,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 21:00:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:19,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:20,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293994301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:20,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:20,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-11-02 21:00:20,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083730200] [2022-11-02 21:00:20,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:20,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 21:00:20,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:20,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 21:00:20,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 21:00:20,020 INFO L87 Difference]: Start difference. First operand 301 states and 343 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 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 21:00:22,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:22,274 INFO L93 Difference]: Finished difference Result 456 states and 502 transitions. [2022-11-02 21:00:22,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:00:22,275 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-02 21:00:22,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:22,276 INFO L225 Difference]: With dead ends: 456 [2022-11-02 21:00:22,276 INFO L226 Difference]: Without dead ends: 438 [2022-11-02 21:00:22,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2022-11-02 21:00:22,277 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 1035 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 2451 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:22,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 2451 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:00:22,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-02 21:00:22,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 305. [2022-11-02 21:00:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.1414473684210527) internal successors, (347), 304 states have internal predecessors, (347), 0 states have call successors, (0), 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 21:00:22,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 347 transitions. [2022-11-02 21:00:22,583 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 347 transitions. Word has length 35 [2022-11-02 21:00:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:22,584 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 347 transitions. [2022-11-02 21:00:22,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 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 21:00:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 347 transitions. [2022-11-02 21:00:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 21:00:22,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:22,585 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:22,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-02 21:00:22,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-02 21:00:22,788 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1280821844, now seen corresponding path program 41 times [2022-11-02 21:00:22,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:22,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909273843] [2022-11-02 21:00:22,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:22,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:22,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:22,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909273843] [2022-11-02 21:00:22,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909273843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:22,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998598156] [2022-11-02 21:00:22,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:00:22,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:22,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:22,918 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:22,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-02 21:00:22,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 21:00:22,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:22,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 21:00:22,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:23,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:23,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998598156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:23,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:23,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-02 21:00:23,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075618139] [2022-11-02 21:00:23,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:23,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 21:00:23,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:23,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 21:00:23,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:00:23,146 INFO L87 Difference]: Start difference. First operand 305 states and 347 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 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 21:00:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:23,723 INFO L93 Difference]: Finished difference Result 394 states and 444 transitions. [2022-11-02 21:00:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 21:00:23,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-02 21:00:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:23,726 INFO L225 Difference]: With dead ends: 394 [2022-11-02 21:00:23,726 INFO L226 Difference]: Without dead ends: 314 [2022-11-02 21:00:23,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:00:23,727 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 96 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:23,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 393 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:00:23,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-02 21:00:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 291. [2022-11-02 21:00:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1344827586206896) internal successors, (329), 290 states have internal predecessors, (329), 0 states have call successors, (0), 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 21:00:24,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2022-11-02 21:00:24,173 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 35 [2022-11-02 21:00:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:24,174 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2022-11-02 21:00:24,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 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 21:00:24,174 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2022-11-02 21:00:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 21:00:24,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:24,175 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:24,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:24,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:24,392 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:24,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:24,393 INFO L85 PathProgramCache]: Analyzing trace with hash 365909845, now seen corresponding path program 42 times [2022-11-02 21:00:24,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:24,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633196511] [2022-11-02 21:00:24,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:24,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:24,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:24,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633196511] [2022-11-02 21:00:24,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633196511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:24,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890008656] [2022-11-02 21:00:24,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:00:24,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:24,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:24,518 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:24,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-02 21:00:24,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 21:00:24,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:24,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 21:00:24,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:24,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:24,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890008656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:24,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:24,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-02 21:00:24,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211408848] [2022-11-02 21:00:24,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:24,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 21:00:24,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:24,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 21:00:24,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:00:24,751 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 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 21:00:25,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:25,353 INFO L93 Difference]: Finished difference Result 321 states and 356 transitions. [2022-11-02 21:00:25,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 21:00:25,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-02 21:00:25,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:25,356 INFO L225 Difference]: With dead ends: 321 [2022-11-02 21:00:25,356 INFO L226 Difference]: Without dead ends: 315 [2022-11-02 21:00:25,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:00:25,357 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 43 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:25,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 183 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:00:25,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-02 21:00:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 292. [2022-11-02 21:00:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 0 states have call successors, (0), 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 21:00:25,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2022-11-02 21:00:25,663 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 35 [2022-11-02 21:00:25,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:25,663 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2022-11-02 21:00:25,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 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 21:00:25,664 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2022-11-02 21:00:25,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 21:00:25,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:25,665 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:25,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:25,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:25,866 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:25,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:25,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1335594960, now seen corresponding path program 43 times [2022-11-02 21:00:25,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:25,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047641511] [2022-11-02 21:00:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:25,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:00:26,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:26,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047641511] [2022-11-02 21:00:26,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047641511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:26,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758468184] [2022-11-02 21:00:26,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:00:26,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:26,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:26,392 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:26,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-02 21:00:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:26,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 21:00:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:00:26,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:00:27,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758468184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:27,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:27,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 41 [2022-11-02 21:00:27,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002201089] [2022-11-02 21:00:27,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:27,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 21:00:27,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:27,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 21:00:27,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1541, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 21:00:27,300 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 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 21:00:29,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:29,792 INFO L93 Difference]: Finished difference Result 540 states and 587 transitions. [2022-11-02 21:00:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-02 21:00:29,793 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 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 36 [2022-11-02 21:00:29,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:29,796 INFO L225 Difference]: With dead ends: 540 [2022-11-02 21:00:29,796 INFO L226 Difference]: Without dead ends: 531 [2022-11-02 21:00:29,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=302, Invalid=3988, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 21:00:29,798 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 229 mSDsluCounter, 3035 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 3152 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:29,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 3152 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 21:00:29,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-11-02 21:00:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2022-11-02 21:00:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1333333333333333) internal successors, (340), 300 states have internal predecessors, (340), 0 states have call successors, (0), 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 21:00:30,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2022-11-02 21:00:30,208 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 36 [2022-11-02 21:00:30,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:30,208 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2022-11-02 21:00:30,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 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 21:00:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2022-11-02 21:00:30,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 21:00:30,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:30,210 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:30,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:30,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:30,436 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:30,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1858622864, now seen corresponding path program 44 times [2022-11-02 21:00:30,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:30,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128305319] [2022-11-02 21:00:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:30,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:00:30,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128305319] [2022-11-02 21:00:30,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128305319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822602185] [2022-11-02 21:00:30,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:00:30,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:30,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:30,923 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:30,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-02 21:00:30,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:00:30,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:30,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 21:00:30,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:00:31,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:00:31,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822602185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:31,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:31,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 39 [2022-11-02 21:00:31,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277721535] [2022-11-02 21:00:31,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:31,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 21:00:31,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 21:00:31,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 21:00:31,800 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 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 21:00:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:33,532 INFO L93 Difference]: Finished difference Result 427 states and 465 transitions. [2022-11-02 21:00:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 21:00:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 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 36 [2022-11-02 21:00:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:33,536 INFO L225 Difference]: With dead ends: 427 [2022-11-02 21:00:33,536 INFO L226 Difference]: Without dead ends: 402 [2022-11-02 21:00:33,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2022-11-02 21:00:33,537 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 157 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:33,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1973 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:00:33,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-02 21:00:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2022-11-02 21:00:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 0 states have call successors, (0), 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 21:00:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2022-11-02 21:00:34,016 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 36 [2022-11-02 21:00:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:34,016 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2022-11-02 21:00:34,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 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 21:00:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2022-11-02 21:00:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 21:00:34,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:34,018 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:34,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-11-02 21:00:34,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:34,232 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:34,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1659359184, now seen corresponding path program 45 times [2022-11-02 21:00:34,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:34,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552002899] [2022-11-02 21:00:34,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:34,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:00:34,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:34,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552002899] [2022-11-02 21:00:34,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552002899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:34,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251951897] [2022-11-02 21:00:34,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:00:34,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:34,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:34,732 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:34,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-02 21:00:34,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 21:00:34,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:34,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 21:00:34,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:00:35,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:00:35,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251951897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:35,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:35,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 37 [2022-11-02 21:00:35,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782149144] [2022-11-02 21:00:35,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:35,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 21:00:35,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:35,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 21:00:35,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 21:00:35,664 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 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 21:00:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:37,179 INFO L93 Difference]: Finished difference Result 352 states and 389 transitions. [2022-11-02 21:00:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 21:00:37,180 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 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 36 [2022-11-02 21:00:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:37,181 INFO L225 Difference]: With dead ends: 352 [2022-11-02 21:00:37,182 INFO L226 Difference]: Without dead ends: 326 [2022-11-02 21:00:37,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=271, Invalid=2921, Unknown=0, NotChecked=0, Total=3192 [2022-11-02 21:00:37,183 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 110 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:37,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1258 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:00:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-02 21:00:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2022-11-02 21:00:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.1357142857142857) internal successors, (318), 280 states have internal predecessors, (318), 0 states have call successors, (0), 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 21:00:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2022-11-02 21:00:37,452 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 36 [2022-11-02 21:00:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:37,452 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2022-11-02 21:00:37,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 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 21:00:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2022-11-02 21:00:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 21:00:37,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:37,453 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:37,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-02 21:00:37,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-02 21:00:37,654 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash 59566704, now seen corresponding path program 46 times [2022-11-02 21:00:37,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:37,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676035443] [2022-11-02 21:00:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:37,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:00:38,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:38,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676035443] [2022-11-02 21:00:38,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676035443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:38,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666319658] [2022-11-02 21:00:38,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:00:38,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:38,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:38,059 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:38,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-02 21:00:38,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:00:38,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:38,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 21:00:38,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:00:38,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:00:38,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666319658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:38,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:38,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2022-11-02 21:00:38,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091409261] [2022-11-02 21:00:38,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:38,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 21:00:38,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:38,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 21:00:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1094, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 21:00:38,977 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 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 21:00:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:40,305 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2022-11-02 21:00:40,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:00:40,306 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 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 36 [2022-11-02 21:00:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:40,308 INFO L225 Difference]: With dead ends: 324 [2022-11-02 21:00:40,308 INFO L226 Difference]: Without dead ends: 318 [2022-11-02 21:00:40,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=265, Invalid=2491, Unknown=0, NotChecked=0, Total=2756 [2022-11-02 21:00:40,309 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:40,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 522 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:00:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-02 21:00:40,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 293. [2022-11-02 21:00:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.1369863013698631) internal successors, (332), 292 states have internal predecessors, (332), 0 states have call successors, (0), 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 21:00:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2022-11-02 21:00:40,730 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 36 [2022-11-02 21:00:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:40,731 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2022-11-02 21:00:40,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 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 21:00:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2022-11-02 21:00:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:00:40,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:40,733 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:40,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:40,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:40,949 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:40,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2086100650, now seen corresponding path program 47 times [2022-11-02 21:00:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:40,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878356179] [2022-11-02 21:00:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:41,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:41,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878356179] [2022-11-02 21:00:41,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878356179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:41,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891320950] [2022-11-02 21:00:41,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:00:41,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:41,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:41,391 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:41,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-02 21:00:41,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-02 21:00:41,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:41,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 21:00:41,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:42,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:42,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891320950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:42,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:42,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2022-11-02 21:00:42,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029954720] [2022-11-02 21:00:42,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:42,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 21:00:42,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:42,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 21:00:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 21:00:42,717 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 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 21:00:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:47,822 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2022-11-02 21:00:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-02 21:00:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 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 37 [2022-11-02 21:00:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:47,825 INFO L225 Difference]: With dead ends: 520 [2022-11-02 21:00:47,825 INFO L226 Difference]: Without dead ends: 482 [2022-11-02 21:00:47,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2002, Invalid=7700, Unknown=0, NotChecked=0, Total=9702 [2022-11-02 21:00:47,826 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1526 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:47,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1526 Valid, 1375 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:00:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-11-02 21:00:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 324. [2022-11-02 21:00:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.1362229102167183) internal successors, (367), 323 states have internal predecessors, (367), 0 states have call successors, (0), 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 21:00:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 367 transitions. [2022-11-02 21:00:48,200 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 367 transitions. Word has length 37 [2022-11-02 21:00:48,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:48,201 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 367 transitions. [2022-11-02 21:00:48,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 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 21:00:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 367 transitions. [2022-11-02 21:00:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:00:48,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:48,202 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:48,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:48,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-02 21:00:48,416 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:48,416 INFO L85 PathProgramCache]: Analyzing trace with hash 804885687, now seen corresponding path program 48 times [2022-11-02 21:00:48,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:48,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49873796] [2022-11-02 21:00:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:48,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:48,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:48,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49873796] [2022-11-02 21:00:48,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49873796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:48,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349208576] [2022-11-02 21:00:48,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:00:48,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:48,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:48,909 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:48,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-02 21:00:48,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-02 21:00:48,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:48,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 21:00:48,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:49,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:00:50,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349208576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:50,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:50,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2022-11-02 21:00:50,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736959916] [2022-11-02 21:00:50,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:50,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 21:00:50,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:50,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 21:00:50,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 21:00:50,469 INFO L87 Difference]: Start difference. First operand 324 states and 367 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 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 21:00:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:53,682 INFO L93 Difference]: Finished difference Result 505 states and 552 transitions. [2022-11-02 21:00:53,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 21:00:53,682 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 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 37 [2022-11-02 21:00:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:53,685 INFO L225 Difference]: With dead ends: 505 [2022-11-02 21:00:53,685 INFO L226 Difference]: Without dead ends: 486 [2022-11-02 21:00:53,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=399, Invalid=3761, Unknown=0, NotChecked=0, Total=4160 [2022-11-02 21:00:53,686 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 1286 mSDsluCounter, 3357 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 3489 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:53,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 3489 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 21:00:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-02 21:00:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2022-11-02 21:00:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.1345565749235473) internal successors, (371), 327 states have internal predecessors, (371), 0 states have call successors, (0), 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 21:00:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 371 transitions. [2022-11-02 21:00:54,098 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 371 transitions. Word has length 37 [2022-11-02 21:00:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:54,099 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 371 transitions. [2022-11-02 21:00:54,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 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 21:00:54,099 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 371 transitions. [2022-11-02 21:00:54,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:00:54,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:54,100 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:54,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:54,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-02 21:00:54,317 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:54,317 INFO L85 PathProgramCache]: Analyzing trace with hash -847136075, now seen corresponding path program 49 times [2022-11-02 21:00:54,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:54,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535484359] [2022-11-02 21:00:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:54,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:54,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:54,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535484359] [2022-11-02 21:00:54,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535484359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:54,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556841620] [2022-11-02 21:00:54,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:00:54,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:54,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:54,453 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:54,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-02 21:00:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:54,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:00:54,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:54,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:54,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556841620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:54,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:54,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2022-11-02 21:00:54,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130449031] [2022-11-02 21:00:54,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:54,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:00:54,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:00:54,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:00:54,752 INFO L87 Difference]: Start difference. First operand 328 states and 371 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 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 21:00:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:55,577 INFO L93 Difference]: Finished difference Result 404 states and 454 transitions. [2022-11-02 21:00:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:00:55,578 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 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 37 [2022-11-02 21:00:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:55,580 INFO L225 Difference]: With dead ends: 404 [2022-11-02 21:00:55,580 INFO L226 Difference]: Without dead ends: 389 [2022-11-02 21:00:55,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2022-11-02 21:00:55,581 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 133 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:55,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 256 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:00:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-11-02 21:00:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 356. [2022-11-02 21:00:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.1492957746478873) internal successors, (408), 355 states have internal predecessors, (408), 0 states have call successors, (0), 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 21:00:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2022-11-02 21:00:56,091 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 37 [2022-11-02 21:00:56,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:56,091 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2022-11-02 21:00:56,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 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 21:00:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2022-11-02 21:00:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:00:56,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:56,093 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:56,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:56,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:56,316 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash 855363028, now seen corresponding path program 50 times [2022-11-02 21:00:56,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:56,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798999940] [2022-11-02 21:00:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:56,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:56,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:56,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798999940] [2022-11-02 21:00:56,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798999940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:56,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020506835] [2022-11-02 21:00:56,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:00:56,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:56,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:56,473 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:56,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-02 21:00:56,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:00:56,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:56,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:00:56,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:56,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:00:56,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020506835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:56,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:00:56,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2022-11-02 21:00:56,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678096730] [2022-11-02 21:00:56,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:56,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:00:56,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:56,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:00:56,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:00:56,778 INFO L87 Difference]: Start difference. First operand 356 states and 408 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 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 21:00:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:57,808 INFO L93 Difference]: Finished difference Result 685 states and 794 transitions. [2022-11-02 21:00:57,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:00:57,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 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 37 [2022-11-02 21:00:57,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:57,812 INFO L225 Difference]: With dead ends: 685 [2022-11-02 21:00:57,812 INFO L226 Difference]: Without dead ends: 561 [2022-11-02 21:00:57,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2022-11-02 21:00:57,813 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 403 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:57,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 403 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:00:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-11-02 21:00:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 414. [2022-11-02 21:00:58,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 0 states have call successors, (0), 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 21:00:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2022-11-02 21:00:58,427 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 37 [2022-11-02 21:00:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:58,428 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2022-11-02 21:00:58,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 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 21:00:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2022-11-02 21:00:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 21:00:58,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:58,430 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:58,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:58,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:58,652 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:58,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:58,653 INFO L85 PathProgramCache]: Analyzing trace with hash -155710033, now seen corresponding path program 51 times [2022-11-02 21:00:58,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:58,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157942480] [2022-11-02 21:00:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:58,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:00:59,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:59,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157942480] [2022-11-02 21:00:59,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157942480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:00:59,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765303731] [2022-11-02 21:00:59,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:00:59,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:59,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:59,424 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:59,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-02 21:00:59,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-02 21:00:59,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:59,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-02 21:00:59,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:01:00,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:01:00,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765303731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:00,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:00,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 44 [2022-11-02 21:01:00,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401995107] [2022-11-02 21:01:00,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:00,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 21:01:00,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:00,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 21:01:00,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 21:01:00,525 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 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 21:01:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:04,146 INFO L93 Difference]: Finished difference Result 761 states and 834 transitions. [2022-11-02 21:01:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 21:01:04,146 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 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 38 [2022-11-02 21:01:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:04,151 INFO L225 Difference]: With dead ends: 761 [2022-11-02 21:01:04,151 INFO L226 Difference]: Without dead ends: 752 [2022-11-02 21:01:04,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2022-11-02 21:01:04,152 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 257 mSDsluCounter, 3939 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 4073 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:04,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 4073 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 21:01:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-02 21:01:04,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 423. [2022-11-02 21:01:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.1492890995260663) internal successors, (485), 422 states have internal predecessors, (485), 0 states have call successors, (0), 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 21:01:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 485 transitions. [2022-11-02 21:01:04,792 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 485 transitions. Word has length 38 [2022-11-02 21:01:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:04,793 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 485 transitions. [2022-11-02 21:01:04,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 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 21:01:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 485 transitions. [2022-11-02 21:01:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 21:01:04,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:04,794 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:04,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:04,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:04,995 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:04,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:04,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1493827249, now seen corresponding path program 52 times [2022-11-02 21:01:04,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:04,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824909285] [2022-11-02 21:01:04,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:04,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:01:05,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:05,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824909285] [2022-11-02 21:01:05,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824909285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:05,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474836945] [2022-11-02 21:01:05,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:01:05,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:05,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:05,700 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:05,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-02 21:01:05,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:01:05,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:01:05,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 21:01:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:01:06,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:01:06,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474836945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:06,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:06,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 42 [2022-11-02 21:01:06,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660705957] [2022-11-02 21:01:06,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:06,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-02 21:01:06,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:06,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-02 21:01:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 21:01:06,880 INFO L87 Difference]: Start difference. First operand 423 states and 485 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 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 21:01:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:09,966 INFO L93 Difference]: Finished difference Result 623 states and 684 transitions. [2022-11-02 21:01:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 21:01:09,966 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 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 38 [2022-11-02 21:01:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:09,969 INFO L225 Difference]: With dead ends: 623 [2022-11-02 21:01:09,969 INFO L226 Difference]: Without dead ends: 597 [2022-11-02 21:01:09,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=295, Invalid=3995, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 21:01:09,970 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 176 mSDsluCounter, 2681 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:09,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 2783 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 21:01:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-11-02 21:01:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 414. [2022-11-02 21:01:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 0 states have call successors, (0), 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 21:01:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2022-11-02 21:01:10,628 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 38 [2022-11-02 21:01:10,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:10,629 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2022-11-02 21:01:10,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 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 21:01:10,629 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2022-11-02 21:01:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 21:01:10,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:10,631 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:10,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-11-02 21:01:10,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-11-02 21:01:10,841 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:10,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:10,841 INFO L85 PathProgramCache]: Analyzing trace with hash -375561937, now seen corresponding path program 53 times [2022-11-02 21:01:10,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:10,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391939064] [2022-11-02 21:01:10,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:10,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:01:11,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:11,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391939064] [2022-11-02 21:01:11,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391939064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:11,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051265471] [2022-11-02 21:01:11,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:01:11,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:11,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:11,499 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:11,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-02 21:01:11,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 21:01:11,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:01:11,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 21:01:11,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:01:12,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:01:12,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051265471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:12,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:12,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2022-11-02 21:01:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021151177] [2022-11-02 21:01:12,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:12,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-02 21:01:12,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:12,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-02 21:01:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 21:01:12,581 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 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 21:01:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:14,995 INFO L93 Difference]: Finished difference Result 530 states and 590 transitions. [2022-11-02 21:01:14,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 21:01:14,995 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 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 38 [2022-11-02 21:01:14,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:14,998 INFO L225 Difference]: With dead ends: 530 [2022-11-02 21:01:14,998 INFO L226 Difference]: Without dead ends: 503 [2022-11-02 21:01:14,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=289, Invalid=3493, Unknown=0, NotChecked=0, Total=3782 [2022-11-02 21:01:14,999 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 135 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:14,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1727 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:01:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-11-02 21:01:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 403. [2022-11-02 21:01:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.1517412935323383) internal successors, (463), 402 states have internal predecessors, (463), 0 states have call successors, (0), 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 21:01:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 463 transitions. [2022-11-02 21:01:15,484 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 463 transitions. Word has length 38 [2022-11-02 21:01:15,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:15,484 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 463 transitions. [2022-11-02 21:01:15,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 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 21:01:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 463 transitions. [2022-11-02 21:01:15,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 21:01:15,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:15,486 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:15,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-02 21:01:15,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:15,700 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:15,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1552999778, now seen corresponding path program 54 times [2022-11-02 21:01:15,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:15,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10581354] [2022-11-02 21:01:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:15,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 21:01:15,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:15,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10581354] [2022-11-02 21:01:15,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10581354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:15,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656093891] [2022-11-02 21:01:15,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:01:15,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:15,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:15,976 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:15,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-02 21:01:16,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 21:01:16,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:01:16,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:01:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 21:01:16,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 21:01:16,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656093891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:16,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:16,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-11-02 21:01:16,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803391912] [2022-11-02 21:01:16,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:16,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 21:01:16,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:16,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 21:01:16,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-11-02 21:01:16,689 INFO L87 Difference]: Start difference. First operand 403 states and 463 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 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 21:01:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:19,011 INFO L93 Difference]: Finished difference Result 556 states and 629 transitions. [2022-11-02 21:01:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 21:01:19,012 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 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) Word has length 38 [2022-11-02 21:01:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:19,015 INFO L225 Difference]: With dead ends: 556 [2022-11-02 21:01:19,016 INFO L226 Difference]: Without dead ends: 502 [2022-11-02 21:01:19,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=675, Invalid=2405, Unknown=0, NotChecked=0, Total=3080 [2022-11-02 21:01:19,017 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 796 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:19,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 712 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:01:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-11-02 21:01:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 446. [2022-11-02 21:01:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.1348314606741574) internal successors, (505), 445 states have internal predecessors, (505), 0 states have call successors, (0), 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 21:01:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 505 transitions. [2022-11-02 21:01:19,613 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 505 transitions. Word has length 38 [2022-11-02 21:01:19,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:19,613 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 505 transitions. [2022-11-02 21:01:19,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 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 21:01:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 505 transitions. [2022-11-02 21:01:19,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 21:01:19,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:19,615 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:19,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-11-02 21:01:19,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-11-02 21:01:19,816 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:19,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:19,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1465831985, now seen corresponding path program 55 times [2022-11-02 21:01:19,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:19,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395370287] [2022-11-02 21:01:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:19,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:01:20,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:20,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395370287] [2022-11-02 21:01:20,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395370287] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:20,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346164808] [2022-11-02 21:01:20,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:01:20,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:20,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:20,404 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:20,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-02 21:01:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 21:01:20,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:01:21,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:01:21,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346164808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:21,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:21,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2022-11-02 21:01:21,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058125255] [2022-11-02 21:01:21,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:21,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 21:01:21,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:21,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 21:01:21,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 21:01:21,556 INFO L87 Difference]: Start difference. First operand 446 states and 505 transitions. Second operand has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 0 states have call successors, (0), 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 21:01:23,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:23,657 INFO L93 Difference]: Finished difference Result 532 states and 594 transitions. [2022-11-02 21:01:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 21:01:23,658 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 0 states have call successors, (0), 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 38 [2022-11-02 21:01:23,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:23,660 INFO L225 Difference]: With dead ends: 532 [2022-11-02 21:01:23,661 INFO L226 Difference]: Without dead ends: 504 [2022-11-02 21:01:23,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=283, Invalid=3023, Unknown=0, NotChecked=0, Total=3306 [2022-11-02 21:01:23,661 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 121 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:23,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 869 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:01:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-02 21:01:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 443. [2022-11-02 21:01:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1380090497737556) internal successors, (503), 442 states have internal predecessors, (503), 0 states have call successors, (0), 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 21:01:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 503 transitions. [2022-11-02 21:01:24,215 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 503 transitions. Word has length 38 [2022-11-02 21:01:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:24,216 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 503 transitions. [2022-11-02 21:01:24,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 0 states have call successors, (0), 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 21:01:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 503 transitions. [2022-11-02 21:01:24,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 21:01:24,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:24,217 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:24,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:24,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-11-02 21:01:24,432 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1135200674, now seen corresponding path program 56 times [2022-11-02 21:01:24,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:24,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14809486] [2022-11-02 21:01:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:24,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 21:01:24,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14809486] [2022-11-02 21:01:24,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14809486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871360213] [2022-11-02 21:01:24,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:01:24,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:24,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:24,713 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:24,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-02 21:01:24,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:01:24,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:01:24,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:01:24,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 21:01:25,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 21:01:25,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871360213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:25,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:25,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-11-02 21:01:25,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673907277] [2022-11-02 21:01:25,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:25,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 21:01:25,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:25,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 21:01:25,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-11-02 21:01:25,521 INFO L87 Difference]: Start difference. First operand 443 states and 503 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 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 21:01:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:27,224 INFO L93 Difference]: Finished difference Result 505 states and 561 transitions. [2022-11-02 21:01:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 21:01:27,225 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 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 38 [2022-11-02 21:01:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:27,228 INFO L225 Difference]: With dead ends: 505 [2022-11-02 21:01:27,228 INFO L226 Difference]: Without dead ends: 476 [2022-11-02 21:01:27,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=234, Invalid=1572, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 21:01:27,229 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 517 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:27,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 1437 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:01:27,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-02 21:01:27,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 443. [2022-11-02 21:01:27,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1199095022624435) internal successors, (495), 442 states have internal predecessors, (495), 0 states have call successors, (0), 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 21:01:27,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 495 transitions. [2022-11-02 21:01:27,877 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 495 transitions. Word has length 38 [2022-11-02 21:01:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:27,878 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 495 transitions. [2022-11-02 21:01:27,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 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 21:01:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 495 transitions. [2022-11-02 21:01:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 21:01:27,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:27,879 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:27,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-11-02 21:01:28,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:28,080 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash 130593719, now seen corresponding path program 57 times [2022-11-02 21:01:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:28,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193220123] [2022-11-02 21:01:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:28,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:01:28,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193220123] [2022-11-02 21:01:28,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193220123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:28,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449511511] [2022-11-02 21:01:28,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:01:28,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:28,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:28,531 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:28,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-02 21:01:28,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 21:01:28,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:01:28,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 21:01:28,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:01:29,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:01:30,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449511511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:30,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:30,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2022-11-02 21:01:30,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833030610] [2022-11-02 21:01:30,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:30,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-02 21:01:30,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:30,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-02 21:01:30,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2217, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 21:01:30,274 INFO L87 Difference]: Start difference. First operand 443 states and 495 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 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 21:01:37,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:37,754 INFO L93 Difference]: Finished difference Result 768 states and 835 transitions. [2022-11-02 21:01:37,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-02 21:01:37,755 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 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 21:01:37,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:37,759 INFO L225 Difference]: With dead ends: 768 [2022-11-02 21:01:37,759 INFO L226 Difference]: Without dead ends: 726 [2022-11-02 21:01:37,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2728, Invalid=10612, Unknown=0, NotChecked=0, Total=13340 [2022-11-02 21:01:37,760 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 2176 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2176 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:37,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2176 Valid, 1556 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:01:37,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-11-02 21:01:38,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 490. [2022-11-02 21:01:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.1186094069529653) internal successors, (547), 489 states have internal predecessors, (547), 0 states have call successors, (0), 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 21:01:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 547 transitions. [2022-11-02 21:01:38,564 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 547 transitions. Word has length 39 [2022-11-02 21:01:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:38,565 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 547 transitions. [2022-11-02 21:01:38,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 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 21:01:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 547 transitions. [2022-11-02 21:01:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 21:01:38,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:38,566 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:38,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:38,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-11-02 21:01:38,772 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:38,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:38,773 INFO L85 PathProgramCache]: Analyzing trace with hash -443143050, now seen corresponding path program 58 times [2022-11-02 21:01:38,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:38,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872000773] [2022-11-02 21:01:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:38,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:01:39,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:39,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872000773] [2022-11-02 21:01:39,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872000773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:39,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072852255] [2022-11-02 21:01:39,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:01:39,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:39,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:39,257 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:39,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-02 21:01:39,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:01:39,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:01:39,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 21:01:39,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:01:40,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:01:41,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072852255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:41,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:41,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2022-11-02 21:01:41,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513629282] [2022-11-02 21:01:41,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:41,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-02 21:01:41,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:41,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-02 21:01:41,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 21:01:41,058 INFO L87 Difference]: Start difference. First operand 490 states and 547 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 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 21:01:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:45,655 INFO L93 Difference]: Finished difference Result 752 states and 814 transitions. [2022-11-02 21:01:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 21:01:45,656 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 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 21:01:45,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:45,658 INFO L225 Difference]: With dead ends: 752 [2022-11-02 21:01:45,658 INFO L226 Difference]: Without dead ends: 731 [2022-11-02 21:01:45,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=477, Invalid=4779, Unknown=0, NotChecked=0, Total=5256 [2022-11-02 21:01:45,659 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 1660 mSDsluCounter, 4193 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 4341 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:45,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1660 Valid, 4341 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 21:01:45,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-11-02 21:01:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 495. [2022-11-02 21:01:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.1174089068825912) internal successors, (552), 494 states have internal predecessors, (552), 0 states have call successors, (0), 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 21:01:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 552 transitions. [2022-11-02 21:01:46,355 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 552 transitions. Word has length 39 [2022-11-02 21:01:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:46,355 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 552 transitions. [2022-11-02 21:01:46,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 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 21:01:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 552 transitions. [2022-11-02 21:01:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 21:01:46,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:46,356 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:46,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-02 21:01:46,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:46,567 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:46,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash -24932840, now seen corresponding path program 59 times [2022-11-02 21:01:46,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:46,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108020389] [2022-11-02 21:01:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:46,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:01:46,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108020389] [2022-11-02 21:01:46,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108020389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671961927] [2022-11-02 21:01:46,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:01:46,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:46,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:46,718 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:46,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-02 21:01:46,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 21:01:46,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:01:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:01:46,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:01:46,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:01:47,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671961927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:47,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:47,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-02 21:01:47,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459724112] [2022-11-02 21:01:47,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:47,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 21:01:47,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:47,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 21:01:47,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:01:47,010 INFO L87 Difference]: Start difference. First operand 495 states and 552 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 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 21:01:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:48,099 INFO L93 Difference]: Finished difference Result 622 states and 690 transitions. [2022-11-02 21:01:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 21:01:48,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 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 21:01:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:48,102 INFO L225 Difference]: With dead ends: 622 [2022-11-02 21:01:48,103 INFO L226 Difference]: Without dead ends: 514 [2022-11-02 21:01:48,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2022-11-02 21:01:48,104 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 118 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:48,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 366 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:01:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-02 21:01:49,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 481. [2022-11-02 21:01:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.1125) internal successors, (534), 480 states have internal predecessors, (534), 0 states have call successors, (0), 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 21:01:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 534 transitions. [2022-11-02 21:01:49,021 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 534 transitions. Word has length 39 [2022-11-02 21:01:49,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:49,021 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 534 transitions. [2022-11-02 21:01:49,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 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 21:01:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 534 transitions. [2022-11-02 21:01:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 21:01:49,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:49,022 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:49,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:49,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-11-02 21:01:49,224 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:49,225 INFO L85 PathProgramCache]: Analyzing trace with hash -601397259, now seen corresponding path program 60 times [2022-11-02 21:01:49,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:49,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897701449] [2022-11-02 21:01:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:49,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:01:49,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897701449] [2022-11-02 21:01:49,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897701449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:49,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601480067] [2022-11-02 21:01:49,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:01:49,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:49,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:49,381 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:49,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-02 21:01:49,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 21:01:49,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:01:49,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:01:49,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:01:49,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:01:49,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601480067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:49,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:49,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-02 21:01:49,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764394185] [2022-11-02 21:01:49,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:49,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 21:01:49,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:49,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 21:01:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:01:49,721 INFO L87 Difference]: Start difference. First operand 481 states and 534 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 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 21:01:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:50,932 INFO L93 Difference]: Finished difference Result 521 states and 570 transitions. [2022-11-02 21:01:50,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 21:01:50,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 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 21:01:50,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:50,936 INFO L225 Difference]: With dead ends: 521 [2022-11-02 21:01:50,936 INFO L226 Difference]: Without dead ends: 515 [2022-11-02 21:01:50,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2022-11-02 21:01:50,937 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 66 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:50,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 245 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:01:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-11-02 21:01:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 482. [2022-11-02 21:01:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 0 states have call successors, (0), 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 21:01:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2022-11-02 21:01:51,692 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 39 [2022-11-02 21:01:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:51,692 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2022-11-02 21:01:51,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 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 21:01:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2022-11-02 21:01:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 21:01:51,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:51,693 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:51,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-02 21:01:51,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-02 21:01:51,894 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:51,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:51,894 INFO L85 PathProgramCache]: Analyzing trace with hash -189895216, now seen corresponding path program 61 times [2022-11-02 21:01:51,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:51,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068217331] [2022-11-02 21:01:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:51,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:01:52,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:01:52,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068217331] [2022-11-02 21:01:52,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068217331] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:01:52,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537603008] [2022-11-02 21:01:52,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:01:52,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:01:52,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:01:52,665 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:01:52,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-02 21:01:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:01:52,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-02 21:01:52,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:01:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:01:53,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:01:53,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537603008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:01:53,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:01:53,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 47 [2022-11-02 21:01:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249050101] [2022-11-02 21:01:53,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:01:53,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-02 21:01:53,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:01:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-02 21:01:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 21:01:53,890 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 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 21:01:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:01:58,424 INFO L93 Difference]: Finished difference Result 872 states and 936 transitions. [2022-11-02 21:01:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-02 21:01:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 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 40 [2022-11-02 21:01:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:01:58,426 INFO L225 Difference]: With dead ends: 872 [2022-11-02 21:01:58,426 INFO L226 Difference]: Without dead ends: 863 [2022-11-02 21:01:58,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=340, Invalid=5360, Unknown=0, NotChecked=0, Total=5700 [2022-11-02 21:01:58,427 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 277 mSDsluCounter, 4143 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 4294 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:01:58,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 4294 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 21:01:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-02 21:01:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 491. [2022-11-02 21:01:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.1122448979591837) internal successors, (545), 490 states have internal predecessors, (545), 0 states have call successors, (0), 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 21:01:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 545 transitions. [2022-11-02 21:01:59,254 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 545 transitions. Word has length 40 [2022-11-02 21:01:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:01:59,254 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 545 transitions. [2022-11-02 21:01:59,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 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 21:01:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 545 transitions. [2022-11-02 21:01:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 21:01:59,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:01:59,256 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:01:59,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-11-02 21:01:59,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-11-02 21:01:59,461 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:01:59,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:01:59,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1171113072, now seen corresponding path program 62 times [2022-11-02 21:01:59,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:01:59,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909664728] [2022-11-02 21:01:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:01:59,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:01:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:02:00,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:00,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909664728] [2022-11-02 21:02:00,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909664728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:00,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273600188] [2022-11-02 21:02:00,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:02:00,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:00,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:00,180 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:00,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-02 21:02:00,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:02:00,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:00,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-02 21:02:00,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:02:01,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:02:01,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273600188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:01,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:02:01,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 45 [2022-11-02 21:02:01,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330591067] [2022-11-02 21:02:01,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:01,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-02 21:02:01,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:01,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-02 21:02:01,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1868, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 21:02:01,422 INFO L87 Difference]: Start difference. First operand 491 states and 545 transitions. Second operand has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 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 21:02:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:05,216 INFO L93 Difference]: Finished difference Result 719 states and 772 transitions. [2022-11-02 21:02:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 21:02:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 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 40 [2022-11-02 21:02:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:05,220 INFO L225 Difference]: With dead ends: 719 [2022-11-02 21:02:05,220 INFO L226 Difference]: Without dead ends: 692 [2022-11-02 21:02:05,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=313, Invalid=4657, Unknown=0, NotChecked=0, Total=4970 [2022-11-02 21:02:05,221 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 192 mSDsluCounter, 3781 mSDsCounter, 0 mSdLazyCounter, 1877 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 3904 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:05,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 3904 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1877 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 21:02:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-11-02 21:02:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 482. [2022-11-02 21:02:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 0 states have call successors, (0), 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 21:02:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2022-11-02 21:02:05,893 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 40 [2022-11-02 21:02:05,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:05,894 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2022-11-02 21:02:05,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 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 21:02:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2022-11-02 21:02:05,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 21:02:05,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:05,895 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:05,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-11-02 21:02:06,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:06,095 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:06,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash 722054608, now seen corresponding path program 63 times [2022-11-02 21:02:06,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:06,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285252421] [2022-11-02 21:02:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:06,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:02:06,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:06,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285252421] [2022-11-02 21:02:06,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285252421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:06,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165795442] [2022-11-02 21:02:06,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:02:06,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:06,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:06,747 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:06,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-02 21:02:06,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 21:02:06,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:06,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 21:02:06,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:02:07,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:02:07,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165795442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:07,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:02:07,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2022-11-02 21:02:07,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485729090] [2022-11-02 21:02:07,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:07,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-02 21:02:07,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:07,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-02 21:02:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1695, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 21:02:07,933 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 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 21:02:10,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:10,974 INFO L93 Difference]: Finished difference Result 617 states and 669 transitions. [2022-11-02 21:02:10,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 21:02:10,974 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 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 40 [2022-11-02 21:02:10,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:10,977 INFO L225 Difference]: With dead ends: 617 [2022-11-02 21:02:10,977 INFO L226 Difference]: Without dead ends: 589 [2022-11-02 21:02:10,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=307, Invalid=4115, Unknown=0, NotChecked=0, Total=4422 [2022-11-02 21:02:10,978 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 150 mSDsluCounter, 2360 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 2449 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:10,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 2449 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 21:02:10,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-11-02 21:02:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 471. [2022-11-02 21:02:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1127659574468085) internal successors, (523), 470 states have internal predecessors, (523), 0 states have call successors, (0), 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 21:02:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 523 transitions. [2022-11-02 21:02:11,635 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 523 transitions. Word has length 40 [2022-11-02 21:02:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:11,636 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 523 transitions. [2022-11-02 21:02:11,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 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 21:02:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 523 transitions. [2022-11-02 21:02:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 21:02:11,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:11,637 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:11,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-11-02 21:02:11,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:11,838 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:11,838 INFO L85 PathProgramCache]: Analyzing trace with hash -923927664, now seen corresponding path program 64 times [2022-11-02 21:02:11,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:11,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945171524] [2022-11-02 21:02:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:11,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:02:12,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:12,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945171524] [2022-11-02 21:02:12,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945171524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:12,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259372160] [2022-11-02 21:02:12,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:02:12,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:12,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:12,397 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:12,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-02 21:02:12,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:02:12,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:12,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 21:02:12,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:02:13,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:02:13,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259372160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:13,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:02:13,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2022-11-02 21:02:13,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211420302] [2022-11-02 21:02:13,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:13,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 21:02:13,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:13,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 21:02:13,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 21:02:13,374 INFO L87 Difference]: Start difference. First operand 471 states and 523 transitions. Second operand has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 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 21:02:15,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:15,355 INFO L93 Difference]: Finished difference Result 535 states and 586 transitions. [2022-11-02 21:02:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 21:02:15,355 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 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 40 [2022-11-02 21:02:15,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:15,357 INFO L225 Difference]: With dead ends: 535 [2022-11-02 21:02:15,357 INFO L226 Difference]: Without dead ends: 506 [2022-11-02 21:02:15,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=301, Invalid=3605, Unknown=0, NotChecked=0, Total=3906 [2022-11-02 21:02:15,358 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 112 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:15,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1234 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:02:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-02 21:02:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 458. [2022-11-02 21:02:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.113785557986871) internal successors, (509), 457 states have internal predecessors, (509), 0 states have call successors, (0), 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 21:02:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 509 transitions. [2022-11-02 21:02:16,103 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 509 transitions. Word has length 40 [2022-11-02 21:02:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:16,104 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 509 transitions. [2022-11-02 21:02:16,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 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 21:02:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 509 transitions. [2022-11-02 21:02:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 21:02:16,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:16,106 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:16,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:16,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:16,328 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:16,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:16,329 INFO L85 PathProgramCache]: Analyzing trace with hash 137817552, now seen corresponding path program 65 times [2022-11-02 21:02:16,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:16,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466322908] [2022-11-02 21:02:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:16,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 21:02:16,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:16,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466322908] [2022-11-02 21:02:16,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466322908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:16,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576162561] [2022-11-02 21:02:16,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:02:16,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:16,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:16,889 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:16,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-02 21:02:16,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 21:02:16,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:16,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 21:02:16,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 21:02:17,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 21:02:18,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576162561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:18,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:02:18,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 39 [2022-11-02 21:02:18,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303341086] [2022-11-02 21:02:18,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:18,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 21:02:18,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 21:02:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 21:02:18,030 INFO L87 Difference]: Start difference. First operand 458 states and 509 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 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 21:02:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:19,716 INFO L93 Difference]: Finished difference Result 504 states and 557 transitions. [2022-11-02 21:02:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 21:02:19,717 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 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 40 [2022-11-02 21:02:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:19,720 INFO L225 Difference]: With dead ends: 504 [2022-11-02 21:02:19,720 INFO L226 Difference]: Without dead ends: 498 [2022-11-02 21:02:19,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2022-11-02 21:02:19,721 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 106 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:19,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 627 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:02:19,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-02 21:02:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 471. [2022-11-02 21:02:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1148936170212767) internal successors, (524), 470 states have internal predecessors, (524), 0 states have call successors, (0), 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 21:02:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 524 transitions. [2022-11-02 21:02:20,362 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 524 transitions. Word has length 40 [2022-11-02 21:02:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:20,362 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 524 transitions. [2022-11-02 21:02:20,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 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 21:02:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 524 transitions. [2022-11-02 21:02:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 21:02:20,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:20,363 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:20,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-02 21:02:20,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:20,564 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:20,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash -929146954, now seen corresponding path program 66 times [2022-11-02 21:02:20,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:20,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664611064] [2022-11-02 21:02:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:20,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:02:21,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664611064] [2022-11-02 21:02:21,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664611064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703282991] [2022-11-02 21:02:21,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:02:21,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:21,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:21,079 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:21,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-02 21:02:21,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-02 21:02:21,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:21,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 21:02:21,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:02:22,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:02:22,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703282991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:22,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:02:22,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2022-11-02 21:02:22,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84171960] [2022-11-02 21:02:22,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:22,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-02 21:02:22,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:22,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-02 21:02:22,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2713, Unknown=0, NotChecked=0, Total=2862 [2022-11-02 21:02:22,946 INFO L87 Difference]: Start difference. First operand 471 states and 524 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 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 21:02:32,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:32,124 INFO L93 Difference]: Finished difference Result 834 states and 902 transitions. [2022-11-02 21:02:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-02 21:02:32,125 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 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 41 [2022-11-02 21:02:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:32,128 INFO L225 Difference]: With dead ends: 834 [2022-11-02 21:02:32,128 INFO L226 Difference]: Without dead ends: 790 [2022-11-02 21:02:32,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 41 SyntacticMatches, 10 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3329 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3617, Invalid=14205, Unknown=0, NotChecked=0, Total=17822 [2022-11-02 21:02:32,129 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 2335 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2335 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:32,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2335 Valid, 1947 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 21:02:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-02 21:02:32,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 519. [2022-11-02 21:02:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.113899613899614) internal successors, (577), 518 states have internal predecessors, (577), 0 states have call successors, (0), 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 21:02:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 577 transitions. [2022-11-02 21:02:32,742 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 577 transitions. Word has length 41 [2022-11-02 21:02:32,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:32,742 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 577 transitions. [2022-11-02 21:02:32,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 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 21:02:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 577 transitions. [2022-11-02 21:02:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 21:02:32,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:32,743 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:32,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:32,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:32,944 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1535117609, now seen corresponding path program 67 times [2022-11-02 21:02:32,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:32,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225596321] [2022-11-02 21:02:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:32,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:02:33,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:33,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225596321] [2022-11-02 21:02:33,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225596321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:33,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089565556] [2022-11-02 21:02:33,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:02:33,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:33,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:33,456 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:33,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-02 21:02:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:33,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 21:02:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:02:34,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:02:35,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089565556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:35,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:02:35,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2022-11-02 21:02:35,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573581275] [2022-11-02 21:02:35,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:35,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-02 21:02:35,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:35,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-02 21:02:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2714, Unknown=0, NotChecked=0, Total=2862 [2022-11-02 21:02:35,291 INFO L87 Difference]: Start difference. First operand 519 states and 577 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 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 21:02:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:40,321 INFO L93 Difference]: Finished difference Result 817 states and 880 transitions. [2022-11-02 21:02:40,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-02 21:02:40,321 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 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 41 [2022-11-02 21:02:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:40,323 INFO L225 Difference]: With dead ends: 817 [2022-11-02 21:02:40,323 INFO L226 Difference]: Without dead ends: 795 [2022-11-02 21:02:40,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 41 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=561, Invalid=5919, Unknown=0, NotChecked=0, Total=6480 [2022-11-02 21:02:40,324 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1867 mSDsluCounter, 4947 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1867 SdHoareTripleChecker+Valid, 5111 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:40,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1867 Valid, 5111 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 21:02:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-11-02 21:02:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 524. [2022-11-02 21:02:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.112810707456979) internal successors, (582), 523 states have internal predecessors, (582), 0 states have call successors, (0), 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 21:02:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 582 transitions. [2022-11-02 21:02:41,019 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 582 transitions. Word has length 41 [2022-11-02 21:02:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:41,019 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 582 transitions. [2022-11-02 21:02:41,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 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 21:02:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 582 transitions. [2022-11-02 21:02:41,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 21:02:41,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:41,021 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:41,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:41,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-11-02 21:02:41,221 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:41,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1578640213, now seen corresponding path program 68 times [2022-11-02 21:02:41,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:41,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073128111] [2022-11-02 21:02:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:41,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:02:41,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:41,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073128111] [2022-11-02 21:02:41,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073128111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:41,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551504044] [2022-11-02 21:02:41,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:02:41,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:41,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:41,364 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:41,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-02 21:02:41,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:02:41,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:41,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:02:41,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:02:41,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:02:41,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551504044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:41,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:02:41,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2022-11-02 21:02:41,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894327295] [2022-11-02 21:02:41,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:41,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 21:02:41,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:41,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 21:02:41,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:02:41,638 INFO L87 Difference]: Start difference. First operand 524 states and 582 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 21:02:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:42,964 INFO L93 Difference]: Finished difference Result 618 states and 684 transitions. [2022-11-02 21:02:42,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 21:02:42,965 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 41 [2022-11-02 21:02:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:42,966 INFO L225 Difference]: With dead ends: 618 [2022-11-02 21:02:42,966 INFO L226 Difference]: Without dead ends: 602 [2022-11-02 21:02:42,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 21:02:42,967 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 160 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:42,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 331 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-11-02 21:02:43,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 558. [2022-11-02 21:02:43,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.125673249551167) internal successors, (627), 557 states have internal predecessors, (627), 0 states have call successors, (0), 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 21:02:43,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 627 transitions. [2022-11-02 21:02:43,913 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 627 transitions. Word has length 41 [2022-11-02 21:02:43,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:43,914 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 627 transitions. [2022-11-02 21:02:43,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 21:02:43,914 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 627 transitions. [2022-11-02 21:02:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 21:02:43,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:43,914 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:43,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:44,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:44,115 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:44,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:44,115 INFO L85 PathProgramCache]: Analyzing trace with hash 888112408, now seen corresponding path program 69 times [2022-11-02 21:02:44,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:44,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874540044] [2022-11-02 21:02:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:44,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:02:44,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:44,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874540044] [2022-11-02 21:02:44,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874540044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:44,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833599386] [2022-11-02 21:02:44,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:02:44,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:44,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:44,271 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:44,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fab4e16-0143-4141-990b-d2f5fbb330e6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-02 21:02:44,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 21:02:44,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:44,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:02:44,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:02:44,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:02:44,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833599386] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:44,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:02:44,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2022-11-02 21:02:44,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157436007] [2022-11-02 21:02:44,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:44,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 21:02:44,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 21:02:44,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:02:44,599 INFO L87 Difference]: Start difference. First operand 558 states and 627 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 21:02:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:46,429 INFO L93 Difference]: Finished difference Result 996 states and 1135 transitions. [2022-11-02 21:02:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 21:02:46,429 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 41 [2022-11-02 21:02:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:46,431 INFO L225 Difference]: With dead ends: 996 [2022-11-02 21:02:46,431 INFO L226 Difference]: Without dead ends: 834 [2022-11-02 21:02:46,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 21:02:46,432 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 381 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:46,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 455 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-11-02 21:02:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 640. [2022-11-02 21:02:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 0 states have call successors, (0), 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 21:02:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2022-11-02 21:02:47,256 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 41 [2022-11-02 21:02:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:47,256 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2022-11-02 21:02:47,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 21:02:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2022-11-02 21:02:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 21:02:47,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:47,258 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]