./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro --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 c6e51ff8c9564e836040d6d35580386edd1169ec75010fdbf7c4eee4bc9fc430 --- 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-8393723 [2022-11-18 18:28:49,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:28:49,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:28:49,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:28:49,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:28:49,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:28:49,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:28:49,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:28:49,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:28:49,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:28:49,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:28:49,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:28:49,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:28:49,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:28:49,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:28:49,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:28:49,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:28:49,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:28:49,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:28:49,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:28:49,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:28:49,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:28:49,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:28:49,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:28:49,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:28:49,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:28:49,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:28:49,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:28:49,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:28:49,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:28:49,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:28:49,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:28:49,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:28:49,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:28:49,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:28:49,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:28:49,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:28:49,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:28:49,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:28:49,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:28:49,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:28:49,902 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:28:49,946 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:28:49,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:28:49,947 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:28:49,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:28:49,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:28:49,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:28:49,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:28:49,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:28:49,949 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:28:49,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:28:49,951 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:28:49,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:28:49,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:28:49,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:28:49,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:28:49,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:28:49,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:28:49,952 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:28:49,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:28:49,952 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:28:49,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:28:49,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:28:49,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:28:49,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:28:49,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:28:49,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:28:49,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:28:49,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:28:49,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:28:49,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:28:49,956 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:28:49,956 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:28:49,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:28:49,956 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_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6e51ff8c9564e836040d6d35580386edd1169ec75010fdbf7c4eee4bc9fc430 [2022-11-18 18:28:50,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:28:50,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:28:50,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:28:50,335 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:28:50,336 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:28:50,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2022-11-18 18:28:50,414 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/data/f74eed887/d904769a60ac4495aafe5b10e451875d/FLAG0c38cb561 [2022-11-18 18:28:51,019 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:28:51,019 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2022-11-18 18:28:51,027 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/data/f74eed887/d904769a60ac4495aafe5b10e451875d/FLAG0c38cb561 [2022-11-18 18:28:51,406 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/data/f74eed887/d904769a60ac4495aafe5b10e451875d [2022-11-18 18:28:51,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:28:51,412 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:28:51,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:28:51,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:28:51,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:28:51,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bcab29a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51, skipping insertion in model container [2022-11-18 18:28:51,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:28:51,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:28:51,628 WARN L234 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_571c798f-8c67-4f6a-8464-29d3f083b9f6/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c[318,331] [2022-11-18 18:28:51,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:28:51,653 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:28:51,665 WARN L234 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_571c798f-8c67-4f6a-8464-29d3f083b9f6/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c[318,331] [2022-11-18 18:28:51,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:28:51,682 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:28:51,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51 WrapperNode [2022-11-18 18:28:51,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:28:51,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:28:51,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:28:51,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:28:51,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,720 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2022-11-18 18:28:51,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:28:51,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:28:51,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:28:51,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:28:51,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,739 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:28:51,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:28:51,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:28:51,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:28:51,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51" (1/1) ... [2022-11-18 18:28:51,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:28:51,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:51,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:28:51,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:28:51,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:28:51,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:28:51,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:28:51,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:28:51,891 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:28:51,893 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:28:52,003 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:28:52,009 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:28:52,009 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 18:28:52,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:28:52 BoogieIcfgContainer [2022-11-18 18:28:52,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:28:52,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:28:52,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:28:52,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:28:52,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:28:51" (1/3) ... [2022-11-18 18:28:52,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d23f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:28:52, skipping insertion in model container [2022-11-18 18:28:52,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:51" (2/3) ... [2022-11-18 18:28:52,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d23f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:28:52, skipping insertion in model container [2022-11-18 18:28:52,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:28:52" (3/3) ... [2022-11-18 18:28:52,028 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2022-11-18 18:28:52,051 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:28:52,051 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:28:52,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:28:52,110 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;@3348c855, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:28:52,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 18:28:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:28:52,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:52,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:28:52,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:52,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:52,137 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2022-11-18 18:28:52,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:52,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283205166] [2022-11-18 18:28:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:52,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:52,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:52,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283205166] [2022-11-18 18:28:52,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283205166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:28:52,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:28:52,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:28:52,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421146200] [2022-11-18 18:28:52,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:52,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:28:52,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:28:52,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:28:52,355 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-18 18:28:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:52,370 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-18 18:28:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:28:52,372 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-18 18:28:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:52,381 INFO L225 Difference]: With dead ends: 20 [2022-11-18 18:28:52,382 INFO L226 Difference]: Without dead ends: 8 [2022-11-18 18:28:52,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:28:52,391 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:52,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:28:52,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-18 18:28:52,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-18 18:28:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-18 18:28:52,426 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-11-18 18:28:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:52,427 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-18 18:28:52,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-18 18:28:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-18 18:28:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:28:52,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:52,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:28:52,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:28:52,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:52,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:52,431 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2022-11-18 18:28:52,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:52,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105799150] [2022-11-18 18:28:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:52,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:52,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:52,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105799150] [2022-11-18 18:28:52,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105799150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:28:52,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:28:52,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:28:52,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842418469] [2022-11-18 18:28:52,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:52,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:28:52,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:28:52,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:28:52,593 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-18 18:28:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:52,639 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2022-11-18 18:28:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:28:52,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2022-11-18 18:28:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:52,640 INFO L225 Difference]: With dead ends: 16 [2022-11-18 18:28:52,641 INFO L226 Difference]: Without dead ends: 10 [2022-11-18 18:28:52,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:28:52,642 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 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 [2022-11-18 18:28:52,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:28:52,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-18 18:28:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-18 18:28:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-18 18:28:52,647 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-11-18 18:28:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:52,648 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-18 18:28:52,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-18 18:28:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-18 18:28:52,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 18:28:52,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:52,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:52,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:28:52,650 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:52,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:52,651 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2022-11-18 18:28:52,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:52,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626821683] [2022-11-18 18:28:52,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:52,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:52,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:52,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626821683] [2022-11-18 18:28:52,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626821683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:28:52,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153258926] [2022-11-18 18:28:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:52,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:52,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:52,736 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:28:52,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:28:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:52,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:28:52,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:28:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:52,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:28:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:52,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153258926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:28:52,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:28:52,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-18 18:28:52,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297585908] [2022-11-18 18:28:52,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:28:52,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:28:52,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:52,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:28:52,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:28:52,943 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:52,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:52,986 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2022-11-18 18:28:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:28:52,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 8 [2022-11-18 18:28:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:52,988 INFO L225 Difference]: With dead ends: 21 [2022-11-18 18:28:52,988 INFO L226 Difference]: Without dead ends: 15 [2022-11-18 18:28:52,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:28:52,990 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:52,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:28:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-18 18:28:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-18 18:28:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-18 18:28:52,995 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2022-11-18 18:28:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:52,995 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-18 18:28:52,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-18 18:28:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:28:52,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:52,996 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:53,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 18:28:53,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:53,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:53,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:53,203 INFO L85 PathProgramCache]: Analyzing trace with hash 598153473, now seen corresponding path program 1 times [2022-11-18 18:28:53,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:53,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137660795] [2022-11-18 18:28:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:53,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:28:53,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:53,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137660795] [2022-11-18 18:28:53,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137660795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:28:53,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696141638] [2022-11-18 18:28:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:53,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:53,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:53,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:28:53,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:28:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:53,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:28:53,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:28:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:28:53,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:28:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:28:53,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696141638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:28:53,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:28:53,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-18 18:28:53,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184389305] [2022-11-18 18:28:53,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:28:53,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:28:53,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:53,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:28:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:28:53,473 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-18 18:28:53,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:53,518 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-11-18 18:28:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:28:53,519 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) Word has length 14 [2022-11-18 18:28:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:53,520 INFO L225 Difference]: With dead ends: 32 [2022-11-18 18:28:53,520 INFO L226 Difference]: Without dead ends: 23 [2022-11-18 18:28:53,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:28:53,522 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:53,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:28:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-18 18:28:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-18 18:28:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-11-18 18:28:53,529 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2022-11-18 18:28:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:53,530 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-11-18 18:28:53,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-18 18:28:53,531 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-11-18 18:28:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 18:28:53,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:53,532 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:53,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:28:53,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:53,737 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:53,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:53,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 2 times [2022-11-18 18:28:53,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:53,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862634173] [2022-11-18 18:28:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:53,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:28:53,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:53,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862634173] [2022-11-18 18:28:53,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862634173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:28:53,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032099134] [2022-11-18 18:28:53,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:28:53,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:53,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:54,007 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:28:54,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:28:54,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:28:54,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:28:54,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:28:54,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:28:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:28:54,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:28:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:28:54,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032099134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:28:54,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:28:54,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-18 18:28:54,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141081628] [2022-11-18 18:28:54,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:28:54,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:28:54,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:54,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:28:54,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:28:54,308 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:54,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:54,385 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-11-18 18:28:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:28:54,385 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2022-11-18 18:28:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:54,386 INFO L225 Difference]: With dead ends: 48 [2022-11-18 18:28:54,386 INFO L226 Difference]: Without dead ends: 39 [2022-11-18 18:28:54,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:28:54,388 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:54,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:28:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-18 18:28:54,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-18 18:28:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 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) [2022-11-18 18:28:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-11-18 18:28:54,395 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2022-11-18 18:28:54,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:54,395 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-11-18 18:28:54,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-11-18 18:28:54,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 18:28:54,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:54,397 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:54,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:28:54,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:54,598 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:54,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:54,598 INFO L85 PathProgramCache]: Analyzing trace with hash -713215707, now seen corresponding path program 3 times [2022-11-18 18:28:54,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:54,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796795261] [2022-11-18 18:28:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:54,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:28:55,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:55,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796795261] [2022-11-18 18:28:55,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796795261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:28:55,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141556301] [2022-11-18 18:28:55,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:28:55,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:55,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:55,043 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:28:55,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:28:55,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 18:28:55,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:28:55,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:28:55,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:28:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-18 18:28:55,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:28:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-18 18:28:55,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141556301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:28:55,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:28:55,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-11-18 18:28:55,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666527154] [2022-11-18 18:28:55,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:28:55,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 18:28:55,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:55,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 18:28:55,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:28:55,321 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2022-11-18 18:28:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:55,448 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-11-18 18:28:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 18:28:55,448 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 [2022-11-18 18:28:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:55,466 INFO L225 Difference]: With dead ends: 58 [2022-11-18 18:28:55,467 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 18:28:55,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:28:55,468 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:55,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:28:55,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 18:28:55,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-18 18:28:55,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 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) [2022-11-18 18:28:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-11-18 18:28:55,481 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 38 [2022-11-18 18:28:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:55,481 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-11-18 18:28:55,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2022-11-18 18:28:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-11-18 18:28:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 18:28:55,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:55,483 INFO L195 NwaCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:55,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:28:55,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:28:55,684 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:55,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:55,684 INFO L85 PathProgramCache]: Analyzing trace with hash 160479836, now seen corresponding path program 4 times [2022-11-18 18:28:55,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:55,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198484448] [2022-11-18 18:28:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:55,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 18:28:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:56,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198484448] [2022-11-18 18:28:56,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198484448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:28:56,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886160721] [2022-11-18 18:28:56,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:28:56,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:56,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:56,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:28:56,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:28:56,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:28:56,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:28:56,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 18:28:56,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:28:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 18:28:56,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:28:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 18:28:56,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886160721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:28:56,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:28:56,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-11-18 18:28:56,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324333114] [2022-11-18 18:28:56,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:28:56,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 18:28:56,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:56,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 18:28:56,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 18:28:56,800 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:56,953 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2022-11-18 18:28:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 18:28:56,954 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-18 18:28:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:56,955 INFO L225 Difference]: With dead ends: 100 [2022-11-18 18:28:56,955 INFO L226 Difference]: Without dead ends: 83 [2022-11-18 18:28:56,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 18:28:56,958 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:56,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:28:56,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-18 18:28:56,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-18 18:28:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2022-11-18 18:28:56,972 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 48 [2022-11-18 18:28:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:56,972 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2022-11-18 18:28:56,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:56,973 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2022-11-18 18:28:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-18 18:28:56,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:56,975 INFO L195 NwaCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:56,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:28:57,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:57,183 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:57,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:57,183 INFO L85 PathProgramCache]: Analyzing trace with hash 722625007, now seen corresponding path program 5 times [2022-11-18 18:28:57,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:57,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167751305] [2022-11-18 18:28:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:57,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 18:28:58,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:58,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167751305] [2022-11-18 18:28:58,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167751305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:28:58,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390201319] [2022-11-18 18:28:58,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:28:58,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:58,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:58,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:28:58,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:28:58,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-11-18 18:28:58,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:28:58,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:28:58,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:28:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 18:28:58,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:29:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 18:29:00,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390201319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:29:00,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:29:00,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2022-11-18 18:29:00,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316420951] [2022-11-18 18:29:00,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:29:00,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-18 18:29:00,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:00,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-18 18:29:00,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 18:29:00,444 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:00,792 INFO L93 Difference]: Finished difference Result 168 states and 214 transitions. [2022-11-18 18:29:00,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-18 18:29:00,793 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 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 82 [2022-11-18 18:29:00,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:00,801 INFO L225 Difference]: With dead ends: 168 [2022-11-18 18:29:00,801 INFO L226 Difference]: Without dead ends: 151 [2022-11-18 18:29:00,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 18:29:00,805 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:00,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:29:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-18 18:29:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-18 18:29:00,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0466666666666666) internal successors, (157), 150 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 157 transitions. [2022-11-18 18:29:00,851 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 157 transitions. Word has length 82 [2022-11-18 18:29:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:00,851 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 157 transitions. [2022-11-18 18:29:00,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 157 transitions. [2022-11-18 18:29:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-18 18:29:00,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:00,863 INFO L195 NwaCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:00,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-18 18:29:01,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:01,069 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:01,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:01,070 INFO L85 PathProgramCache]: Analyzing trace with hash -682364203, now seen corresponding path program 6 times [2022-11-18 18:29:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:01,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330047971] [2022-11-18 18:29:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:01,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 18:29:04,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:04,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330047971] [2022-11-18 18:29:04,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330047971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:29:04,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204216574] [2022-11-18 18:29:04,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:29:04,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:04,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:04,523 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:29:04,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:29:04,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-11-18 18:29:04,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:29:04,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:29:04,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-11-18 18:29:05,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:29:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-11-18 18:29:05,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204216574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:29:05,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:29:05,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 9, 9] total 83 [2022-11-18 18:29:05,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511695748] [2022-11-18 18:29:05,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:29:05,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-18 18:29:05,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:05,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-18 18:29:05,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2022-11-18 18:29:05,619 INFO L87 Difference]: Start difference. First operand 151 states and 157 transitions. Second operand has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 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) [2022-11-18 18:29:06,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:06,103 INFO L93 Difference]: Finished difference Result 186 states and 215 transitions. [2022-11-18 18:29:06,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-18 18:29:06,107 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 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) Word has length 150 [2022-11-18 18:29:06,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:06,111 INFO L225 Difference]: With dead ends: 186 [2022-11-18 18:29:06,112 INFO L226 Difference]: Without dead ends: 169 [2022-11-18 18:29:06,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2022-11-18 18:29:06,117 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 155 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:06,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 15 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:29:06,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-18 18:29:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-18 18:29:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0892857142857142) internal successors, (183), 168 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) [2022-11-18 18:29:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2022-11-18 18:29:06,145 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 150 [2022-11-18 18:29:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:06,147 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2022-11-18 18:29:06,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 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) [2022-11-18 18:29:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2022-11-18 18:29:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-18 18:29:06,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:06,154 INFO L195 NwaCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:06,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:06,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 18:29:06,359 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:06,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:06,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1511260128, now seen corresponding path program 7 times [2022-11-18 18:29:06,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:06,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279177295] [2022-11-18 18:29:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:06,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-18 18:29:09,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:09,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279177295] [2022-11-18 18:29:09,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279177295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:29:09,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47745496] [2022-11-18 18:29:09,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:29:09,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:09,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:09,568 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:29:09,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:29:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:09,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-18 18:29:09,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-18 18:29:09,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:29:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-18 18:29:16,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47745496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:29:16,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:29:16,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2022-11-18 18:29:16,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149666447] [2022-11-18 18:29:16,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:29:16,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-11-18 18:29:16,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:16,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-11-18 18:29:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-11-18 18:29:16,576 INFO L87 Difference]: Start difference. First operand 169 states and 183 transitions. Second operand has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:17,279 INFO L93 Difference]: Finished difference Result 340 states and 437 transitions. [2022-11-18 18:29:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-18 18:29:17,280 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 0 states have call successors, (0), 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 168 [2022-11-18 18:29:17,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:17,282 INFO L225 Difference]: With dead ends: 340 [2022-11-18 18:29:17,282 INFO L226 Difference]: Without dead ends: 307 [2022-11-18 18:29:17,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-11-18 18:29:17,287 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:17,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 18:29:17,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-18 18:29:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-11-18 18:29:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.0490196078431373) internal successors, (321), 306 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 321 transitions. [2022-11-18 18:29:17,305 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 321 transitions. Word has length 168 [2022-11-18 18:29:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:17,306 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 321 transitions. [2022-11-18 18:29:17,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 321 transitions. [2022-11-18 18:29:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-11-18 18:29:17,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:17,310 INFO L195 NwaCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:17,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:17,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:17,517 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:17,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:17,518 INFO L85 PathProgramCache]: Analyzing trace with hash 55731535, now seen corresponding path program 8 times [2022-11-18 18:29:17,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:17,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835141055] [2022-11-18 18:29:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:17,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-18 18:29:29,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:29,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835141055] [2022-11-18 18:29:29,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835141055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:29:29,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093463309] [2022-11-18 18:29:29,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:29:29,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:29,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:29,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:29:29,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:29:29,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:29:29,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:29:29,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-18 18:29:29,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-18 18:29:30,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:29:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-18 18:29:53,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093463309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:29:53,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:29:53,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2022-11-18 18:29:53,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754542167] [2022-11-18 18:29:53,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:29:53,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2022-11-18 18:29:53,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:53,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2022-11-18 18:29:53,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-11-18 18:29:53,527 INFO L87 Difference]: Start difference. First operand 307 states and 321 transitions. Second operand has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:56,099 INFO L93 Difference]: Finished difference Result 616 states and 782 transitions. [2022-11-18 18:29:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-11-18 18:29:56,100 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 0 states have call successors, (0), 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 306 [2022-11-18 18:29:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:56,102 INFO L225 Difference]: With dead ends: 616 [2022-11-18 18:29:56,103 INFO L226 Difference]: Without dead ends: 583 [2022-11-18 18:29:56,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-11-18 18:29:56,110 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:56,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 18:29:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-18 18:29:56,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2022-11-18 18:29:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.0257731958762886) internal successors, (597), 582 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 597 transitions. [2022-11-18 18:29:56,138 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 597 transitions. Word has length 306 [2022-11-18 18:29:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:56,139 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 597 transitions. [2022-11-18 18:29:56,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:56,140 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 597 transitions. [2022-11-18 18:29:56,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-11-18 18:29:56,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:56,156 INFO L195 NwaCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:56,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:56,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:29:56,363 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:56,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1666677907, now seen corresponding path program 9 times [2022-11-18 18:29:56,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:56,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099148412] [2022-11-18 18:29:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:56,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-18 18:30:42,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:42,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099148412] [2022-11-18 18:30:42,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099148412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:42,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972270770] [2022-11-18 18:30:42,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:30:42,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:42,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:42,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:42,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:30:42,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-11-18 18:30:42,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:42,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 18:30:42,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2022-11-18 18:30:45,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2022-11-18 18:30:49,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972270770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:49,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:49,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 17, 17] total 307 [2022-11-18 18:30:49,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749937350] [2022-11-18 18:30:49,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:49,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 307 states [2022-11-18 18:30:49,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:49,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 307 interpolants. [2022-11-18 18:30:49,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46971, Invalid=46971, Unknown=0, NotChecked=0, Total=93942 [2022-11-18 18:30:49,368 INFO L87 Difference]: Start difference. First operand 583 states and 597 transitions. Second operand has 307 states, 307 states have (on average 2.022801302931596) internal successors, (621), 307 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:54,625 INFO L93 Difference]: Finished difference Result 650 states and 711 transitions. [2022-11-18 18:30:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 307 states. [2022-11-18 18:30:54,627 INFO L78 Accepts]: Start accepts. Automaton has has 307 states, 307 states have (on average 2.022801302931596) internal successors, (621), 307 states have internal predecessors, (621), 0 states have call successors, (0), 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 582 [2022-11-18 18:30:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:54,631 INFO L225 Difference]: With dead ends: 650 [2022-11-18 18:30:54,631 INFO L226 Difference]: Without dead ends: 617 [2022-11-18 18:30:54,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1439 GetRequests, 1134 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=46971, Invalid=46971, Unknown=0, NotChecked=0, Total=93942 [2022-11-18 18:30:54,638 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 595 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1554 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:54,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 27 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1554 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 18:30:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-18 18:30:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2022-11-18 18:30:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 1.0503246753246753) internal successors, (647), 616 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 647 transitions. [2022-11-18 18:30:54,665 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 647 transitions. Word has length 582 [2022-11-18 18:30:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:54,666 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 647 transitions. [2022-11-18 18:30:54,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 307 states, 307 states have (on average 2.022801302931596) internal successors, (621), 307 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 647 transitions. [2022-11-18 18:30:54,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2022-11-18 18:30:54,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:54,684 INFO L195 NwaCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:54,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:54,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:54,888 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:30:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:54,888 INFO L85 PathProgramCache]: Analyzing trace with hash 122564320, now seen corresponding path program 10 times [2022-11-18 18:30:54,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:54,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720842900] [2022-11-18 18:30:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:54,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-11-18 18:31:41,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720842900] [2022-11-18 18:31:41,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720842900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340654633] [2022-11-18 18:31:41,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:31:41,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:41,794 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:41,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:31:42,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:31:42,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:31:42,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 277 conjunts are in the unsatisfiable core [2022-11-18 18:31:42,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-11-18 18:31:43,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-11-18 18:33:17,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340654633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:17,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:17,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 278, 278] total 555 [2022-11-18 18:33:17,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632577906] [2022-11-18 18:33:17,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:17,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 555 states [2022-11-18 18:33:17,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 555 interpolants. [2022-11-18 18:33:17,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2022-11-18 18:33:17,798 INFO L87 Difference]: Start difference. First operand 617 states and 647 transitions. Second operand has 555 states, 555 states have (on average 2.0108108108108107) internal successors, (1116), 555 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:31,159 INFO L93 Difference]: Finished difference Result 1236 states and 1573 transitions. [2022-11-18 18:33:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2022-11-18 18:33:31,161 INFO L78 Accepts]: Start accepts. Automaton has has 555 states, 555 states have (on average 2.0108108108108107) internal successors, (1116), 555 states have internal predecessors, (1116), 0 states have call successors, (0), 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 616 [2022-11-18 18:33:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:31,165 INFO L225 Difference]: With dead ends: 1236 [2022-11-18 18:33:31,166 INFO L226 Difference]: Without dead ends: 1171 [2022-11-18 18:33:31,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 955 SyntacticMatches, 0 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 123.9s TimeCoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2022-11-18 18:33:31,182 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:31,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 18:33:31,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-11-18 18:33:31,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1171. [2022-11-18 18:33:31,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 1.0264957264957264) internal successors, (1201), 1170 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1201 transitions. [2022-11-18 18:33:31,228 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1201 transitions. Word has length 616 [2022-11-18 18:33:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:31,229 INFO L495 AbstractCegarLoop]: Abstraction has 1171 states and 1201 transitions. [2022-11-18 18:33:31,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 555 states, 555 states have (on average 2.0108108108108107) internal successors, (1116), 555 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1201 transitions. [2022-11-18 18:33:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1171 [2022-11-18 18:33:31,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:31,242 INFO L195 NwaCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:31,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:31,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:31,443 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:31,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:31,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1917501825, now seen corresponding path program 11 times [2022-11-18 18:33:31,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:31,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485999097] [2022-11-18 18:33:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:31,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-11-18 18:37:20,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:20,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485999097] [2022-11-18 18:37:20,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485999097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:20,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300507152] [2022-11-18 18:37:20,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:37:20,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:20,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:20,942 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:20,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_571c798f-8c67-4f6a-8464-29d3f083b9f6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:37:24,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-11-18 18:37:24,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:37:24,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 2425 conjuncts, 554 conjunts are in the unsatisfiable core [2022-11-18 18:37:24,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-11-18 18:37:26,015 INFO L328 TraceCheckSpWp]: Computing backward predicates...