./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ae51dc9203c351522c25ee3116b2cda704928bb61769972b6b90792bfdf57f19 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:51:35,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:51:35,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:51:35,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:51:35,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:51:35,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:51:35,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:51:35,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:51:35,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:51:35,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:51:35,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:51:35,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:51:35,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:51:35,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:51:35,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:51:35,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:51:35,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:51:35,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:51:35,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:51:35,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:51:35,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:51:35,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:51:35,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:51:35,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:51:35,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:51:35,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:51:35,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:51:35,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:51:35,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:51:35,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:51:35,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:51:35,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:51:35,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:51:35,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:51:35,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:51:35,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:51:35,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:51:35,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:51:35,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:51:35,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:51:35,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:51:35,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:51:35,670 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:51:35,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:51:35,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:51:35,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:51:35,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:51:35,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:51:35,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:51:35,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:51:35,674 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:51:35,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:51:35,675 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:51:35,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:51:35,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:51:35,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:51:35,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:51:35,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:51:35,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:51:35,677 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:51:35,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:51:35,677 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:51:35,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:51:35,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:51:35,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:51:35,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:51:35,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:51:35,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:51:35,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:51:35,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:51:35,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:51:35,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:51:35,680 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:51:35,680 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:51:35,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:51:35,681 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_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae51dc9203c351522c25ee3116b2cda704928bb61769972b6b90792bfdf57f19 [2022-11-02 20:51:35,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:51:35,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:51:35,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:51:35,980 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:51:35,981 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:51:35,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2022-11-02 20:51:36,081 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/data/55b8b409b/0c65cf663cb54160a6adb80876e6e3a1/FLAG434050d69 [2022-11-02 20:51:36,675 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:51:36,676 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2022-11-02 20:51:36,683 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/data/55b8b409b/0c65cf663cb54160a6adb80876e6e3a1/FLAG434050d69 [2022-11-02 20:51:37,066 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/data/55b8b409b/0c65cf663cb54160a6adb80876e6e3a1 [2022-11-02 20:51:37,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:51:37,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:51:37,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:51:37,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:51:37,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:51:37,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ec691c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37, skipping insertion in model container [2022-11-02 20:51:37,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:51:37,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:51:37,334 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c[318,331] [2022-11-02 20:51:37,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:51:37,366 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:51:37,383 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c[318,331] [2022-11-02 20:51:37,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:51:37,407 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:51:37,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37 WrapperNode [2022-11-02 20:51:37,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:51:37,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:51:37,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:51:37,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:51:37,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,451 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2022-11-02 20:51:37,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:51:37,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:51:37,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:51:37,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:51:37,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,486 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:51:37,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:51:37,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:51:37,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:51:37,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37" (1/1) ... [2022-11-02 20:51:37,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:51:37,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:37,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:51:37,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:51:37,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:51:37,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:51:37,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:51:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:51:37,680 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:51:37,682 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:51:37,799 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:51:37,806 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:51:37,806 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:51:37,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:51:37 BoogieIcfgContainer [2022-11-02 20:51:37,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:51:37,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:51:37,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:51:37,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:51:37,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:51:37" (1/3) ... [2022-11-02 20:51:37,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68828f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:51:37, skipping insertion in model container [2022-11-02 20:51:37,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:51:37" (2/3) ... [2022-11-02 20:51:37,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68828f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:51:37, skipping insertion in model container [2022-11-02 20:51:37,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:51:37" (3/3) ... [2022-11-02 20:51:37,818 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2022-11-02 20:51:37,839 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:51:37,839 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:51:37,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:51:37,901 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;@67528a02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:51:37,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:51:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:37,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:51:37,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:37,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:37,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:37,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2022-11-02 20:51:37,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:37,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946445021] [2022-11-02 20:51:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:37,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:38,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:38,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946445021] [2022-11-02 20:51:38,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946445021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:38,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:38,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:51:38,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329291752] [2022-11-02 20:51:38,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:38,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:51:38,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:51:38,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:51:38,192 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:38,207 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2022-11-02 20:51:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:51:38,211 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-11-02 20:51:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:38,221 INFO L225 Difference]: With dead ends: 22 [2022-11-02 20:51:38,222 INFO L226 Difference]: Without dead ends: 9 [2022-11-02 20:51:38,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:51:38,230 INFO L413 NwaCegarLoop]: 15 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, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:38,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:51:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-02 20:51:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-02 20:51:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2022-11-02 20:51:38,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-11-02 20:51:38,270 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2022-11-02 20:51:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:38,271 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-11-02 20:51:38,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-11-02 20:51:38,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:51:38,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:38,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:38,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:51:38,275 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2022-11-02 20:51:38,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:38,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546746337] [2022-11-02 20:51:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:38,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:38,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:38,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546746337] [2022-11-02 20:51:38,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546746337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:38,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:38,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:51:38,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163426035] [2022-11-02 20:51:38,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:38,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:51:38,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:38,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:51:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:38,419 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:38,440 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2022-11-02 20:51:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:51:38,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-11-02 20:51:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:38,441 INFO L225 Difference]: With dead ends: 18 [2022-11-02 20:51:38,441 INFO L226 Difference]: Without dead ends: 11 [2022-11-02 20:51:38,442 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 [2022-11-02 20:51:38,443 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:38,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:51:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-02 20:51:38,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-02 20:51:38,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-02 20:51:38,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-11-02 20:51:38,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:38,449 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-02 20:51:38,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-02 20:51:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 20:51:38,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:38,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:38,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:51:38,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:38,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:38,452 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2022-11-02 20:51:38,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:38,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257972197] [2022-11-02 20:51:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:38,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:51:38,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:38,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257972197] [2022-11-02 20:51:38,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257972197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:38,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:38,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:51:38,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438874171] [2022-11-02 20:51:38,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:38,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:51:38,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:38,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:51:38,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:38,520 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-02 20:51:38,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:38,541 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-11-02 20:51:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:51:38,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) Word has length 9 [2022-11-02 20:51:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:38,543 INFO L225 Difference]: With dead ends: 16 [2022-11-02 20:51:38,543 INFO L226 Difference]: Without dead ends: 12 [2022-11-02 20:51:38,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:38,545 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:38,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:51:38,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-02 20:51:38,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-02 20:51:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-02 20:51:38,568 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-11-02 20:51:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:38,569 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-02 20:51:38,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-02 20:51:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-02 20:51:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:51:38,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:38,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:38,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:51:38,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash 698628545, now seen corresponding path program 1 times [2022-11-02 20:51:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:38,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877586468] [2022-11-02 20:51:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:38,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:51:38,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:38,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877586468] [2022-11-02 20:51:38,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877586468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:38,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111825340] [2022-11-02 20:51:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:38,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:38,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:38,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:38,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:51:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:38,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:51:38,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:51:38,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:51:38,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111825340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:38,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:38,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-02 20:51:38,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001789840] [2022-11-02 20:51:38,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:38,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:51:38,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:38,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:51:38,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:51:38,857 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2022-11-02 20:51:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:38,925 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2022-11-02 20:51:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:51:38,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) Word has length 10 [2022-11-02 20:51:38,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:38,928 INFO L225 Difference]: With dead ends: 25 [2022-11-02 20:51:38,928 INFO L226 Difference]: Without dead ends: 17 [2022-11-02 20:51:38,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:51:38,930 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:38,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:51:38,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-02 20:51:38,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-02 20:51:38,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:38,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-02 20:51:38,937 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2022-11-02 20:51:38,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:38,937 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-02 20:51:38,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2022-11-02 20:51:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-02 20:51:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:51:38,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:38,940 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:38,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:39,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:39,154 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash -693598994, now seen corresponding path program 1 times [2022-11-02 20:51:39,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:39,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885960043] [2022-11-02 20:51:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:39,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:51:39,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:39,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885960043] [2022-11-02 20:51:39,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885960043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:39,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461171246] [2022-11-02 20:51:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:39,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:39,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:39,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:39,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:51:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:39,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:51:39,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:51:39,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:51:39,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461171246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:39,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:39,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-02 20:51:39,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92975862] [2022-11-02 20:51:39,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:39,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:51:39,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:39,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:51:39,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:51:39,414 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:39,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:39,460 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-02 20:51:39,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:51:39,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 16 [2022-11-02 20:51:39,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:39,466 INFO L225 Difference]: With dead ends: 36 [2022-11-02 20:51:39,467 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 20:51:39,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:51:39,468 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:39,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:51:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 20:51:39,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-02 20:51:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-02 20:51:39,482 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2022-11-02 20:51:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:39,483 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-02 20:51:39,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:39,484 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-02 20:51:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:51:39,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:39,485 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:39,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:39,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:39,686 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:39,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash 219186682, now seen corresponding path program 2 times [2022-11-02 20:51:39,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:39,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955769756] [2022-11-02 20:51:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:39,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:51:39,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:39,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955769756] [2022-11-02 20:51:39,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955769756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:39,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928208365] [2022-11-02 20:51:39,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:51:39,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:39,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:39,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:39,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:51:39,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:51:39,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:51:39,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:51:39,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:51:40,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:51:40,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928208365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:40,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:40,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-02 20:51:40,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756638313] [2022-11-02 20:51:40,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:40,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:51:40,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:51:40,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:51:40,191 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:40,288 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-11-02 20:51:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:51:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-02 20:51:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:40,295 INFO L225 Difference]: With dead ends: 52 [2022-11-02 20:51:40,295 INFO L226 Difference]: Without dead ends: 41 [2022-11-02 20:51:40,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:51:40,299 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:40,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:51:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-02 20:51:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-02 20:51:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-11-02 20:51:40,315 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 24 [2022-11-02 20:51:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:40,316 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-11-02 20:51:40,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-11-02 20:51:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:51:40,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:40,318 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:40,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:40,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:40,530 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:40,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1801004050, now seen corresponding path program 3 times [2022-11-02 20:51:40,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:40,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217206080] [2022-11-02 20:51:40,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:40,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:51:41,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:41,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217206080] [2022-11-02 20:51:41,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217206080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:41,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728335235] [2022-11-02 20:51:41,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:51:41,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:41,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:41,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:41,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:51:41,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:51:41,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:51:41,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:51:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-02 20:51:41,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-02 20:51:41,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728335235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:41,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:41,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-11-02 20:51:41,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020952604] [2022-11-02 20:51:41,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:41,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:51:41,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:41,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:51:41,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:51:41,451 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:41,800 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-11-02 20:51:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:51:41,806 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-02 20:51:41,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:41,807 INFO L225 Difference]: With dead ends: 63 [2022-11-02 20:51:41,807 INFO L226 Difference]: Without dead ends: 52 [2022-11-02 20:51:41,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:51:41,809 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:41,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 25 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:51:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-02 20:51:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-11-02 20:51:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-11-02 20:51:41,817 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2022-11-02 20:51:41,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:41,818 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-11-02 20:51:41,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-11-02 20:51:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:51:41,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:41,827 INFO L195 NwaCegarLoop]: trace histogram [17, 15, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:41,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:42,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:42,042 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1274064215, now seen corresponding path program 4 times [2022-11-02 20:51:42,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:42,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617968715] [2022-11-02 20:51:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:42,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:51:42,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:42,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617968715] [2022-11-02 20:51:42,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617968715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:42,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546471487] [2022-11-02 20:51:42,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:51:42,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:42,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:42,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:42,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:51:42,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:51:42,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:51:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:51:42,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:51:42,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:51:43,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546471487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:43,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:43,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-11-02 20:51:43,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848385873] [2022-11-02 20:51:43,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:43,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:51:43,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:43,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:51:43,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:51:43,153 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:43,310 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2022-11-02 20:51:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:51:43,311 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-02 20:51:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:43,313 INFO L225 Difference]: With dead ends: 94 [2022-11-02 20:51:43,313 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 20:51:43,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:51:43,315 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:43,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:51:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 20:51:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-02 20:51:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-11-02 20:51:43,358 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 45 [2022-11-02 20:51:43,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:43,358 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-11-02 20:51:43,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:43,359 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-11-02 20:51:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-02 20:51:43,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:43,360 INFO L195 NwaCegarLoop]: trace histogram [34, 32, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:43,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:43,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:43,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:43,562 INFO L85 PathProgramCache]: Analyzing trace with hash -194287964, now seen corresponding path program 5 times [2022-11-02 20:51:43,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:43,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604782618] [2022-11-02 20:51:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:43,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:51:44,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:44,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604782618] [2022-11-02 20:51:44,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604782618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:44,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250998132] [2022-11-02 20:51:44,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:51:44,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:44,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:44,528 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:44,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:51:44,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-11-02 20:51:44,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:51:44,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:51:44,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:51:44,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:51:46,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250998132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:46,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:46,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2022-11-02 20:51:46,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951612516] [2022-11-02 20:51:46,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:46,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-02 20:51:46,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-02 20:51:46,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-11-02 20:51:46,504 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:46,816 INFO L93 Difference]: Finished difference Result 162 states and 202 transitions. [2022-11-02 20:51:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-02 20:51:46,817 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 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 79 [2022-11-02 20:51:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:46,822 INFO L225 Difference]: With dead ends: 162 [2022-11-02 20:51:46,822 INFO L226 Difference]: Without dead ends: 148 [2022-11-02 20:51:46,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-11-02 20:51:46,827 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:46,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:51:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-02 20:51:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-02 20:51:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 147 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2022-11-02 20:51:46,864 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 79 [2022-11-02 20:51:46,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:46,866 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2022-11-02 20:51:46,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2022-11-02 20:51:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-02 20:51:46,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:46,884 INFO L195 NwaCegarLoop]: trace histogram [68, 66, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:46,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:47,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:51:47,099 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:47,099 INFO L85 PathProgramCache]: Analyzing trace with hash 568323966, now seen corresponding path program 6 times [2022-11-02 20:51:47,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:47,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094332075] [2022-11-02 20:51:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:47,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:51:50,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:50,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094332075] [2022-11-02 20:51:50,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094332075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:50,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983359672] [2022-11-02 20:51:50,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:51:50,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:50,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:50,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:50,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:51:50,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-02 20:51:50,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:51:50,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:51:50,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 202 proven. 10 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-11-02 20:51:51,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 202 proven. 10 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-11-02 20:51:51,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983359672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:51,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:51,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 8, 8] total 81 [2022-11-02 20:51:51,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088861550] [2022-11-02 20:51:51,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:51,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-02 20:51:51,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:51,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-02 20:51:51,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2436, Invalid=4044, Unknown=0, NotChecked=0, Total=6480 [2022-11-02 20:51:51,595 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:54,679 INFO L93 Difference]: Finished difference Result 176 states and 192 transitions. [2022-11-02 20:51:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-02 20:51:54,680 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 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 147 [2022-11-02 20:51:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:54,681 INFO L225 Difference]: With dead ends: 176 [2022-11-02 20:51:54,681 INFO L226 Difference]: Without dead ends: 162 [2022-11-02 20:51:54,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3106 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7729, Invalid=14027, Unknown=0, NotChecked=0, Total=21756 [2022-11-02 20:51:54,690 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 146 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:54,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 61 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:51:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-02 20:51:54,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2022-11-02 20:51:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2022-11-02 20:51:54,708 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 147 [2022-11-02 20:51:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:54,709 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2022-11-02 20:51:54,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2022-11-02 20:51:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-02 20:51:54,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:54,712 INFO L195 NwaCegarLoop]: trace histogram [69, 67, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:54,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:54,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:51:54,938 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:54,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:54,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1924451707, now seen corresponding path program 7 times [2022-11-02 20:51:54,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:54,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780773827] [2022-11-02 20:51:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:54,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-02 20:51:58,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:58,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780773827] [2022-11-02 20:51:58,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780773827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:58,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371708569] [2022-11-02 20:51:58,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:51:58,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:58,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:58,199 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:58,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:51:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:58,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-02 20:51:58,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-02 20:51:58,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-02 20:52:04,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371708569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:04,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:04,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2022-11-02 20:52:04,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503394112] [2022-11-02 20:52:04,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:04,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-11-02 20:52:04,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:04,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-11-02 20:52:04,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-11-02 20:52:04,438 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:05,127 INFO L93 Difference]: Finished difference Result 314 states and 389 transitions. [2022-11-02 20:52:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-02 20:52:05,129 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 0 states have call successors, (0), 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 155 [2022-11-02 20:52:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:52:05,130 INFO L225 Difference]: With dead ends: 314 [2022-11-02 20:52:05,131 INFO L226 Difference]: Without dead ends: 294 [2022-11-02 20:52:05,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-11-02 20:52:05,133 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:52:05,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:52:05,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-02 20:52:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-11-02 20:52:05,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.0136518771331058) internal successors, (297), 293 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:05,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 297 transitions. [2022-11-02 20:52:05,157 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 297 transitions. Word has length 155 [2022-11-02 20:52:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:52:05,157 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 297 transitions. [2022-11-02 20:52:05,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:05,158 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 297 transitions. [2022-11-02 20:52:05,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-11-02 20:52:05,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:52:05,163 INFO L195 NwaCegarLoop]: trace histogram [138, 136, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:05,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:05,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:05,379 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:52:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:05,379 INFO L85 PathProgramCache]: Analyzing trace with hash 25602028, now seen corresponding path program 8 times [2022-11-02 20:52:05,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:05,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920958447] [2022-11-02 20:52:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:05,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-02 20:52:16,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:16,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920958447] [2022-11-02 20:52:16,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920958447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:16,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144792544] [2022-11-02 20:52:16,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:52:16,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:16,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:16,454 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:16,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:52:16,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:52:16,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:52:16,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-02 20:52:16,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-02 20:52:17,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-02 20:52:39,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144792544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:39,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:39,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2022-11-02 20:52:39,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460545588] [2022-11-02 20:52:39,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:39,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2022-11-02 20:52:39,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:39,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2022-11-02 20:52:39,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-11-02 20:52:39,340 INFO L87 Difference]: Start difference. First operand 294 states and 297 transitions. Second operand has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:41,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:41,418 INFO L93 Difference]: Finished difference Result 590 states and 734 transitions. [2022-11-02 20:52:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-11-02 20:52:41,419 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 0 states have call successors, (0), 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 293 [2022-11-02 20:52:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:52:41,422 INFO L225 Difference]: With dead ends: 590 [2022-11-02 20:52:41,422 INFO L226 Difference]: Without dead ends: 570 [2022-11-02 20:52:41,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-11-02 20:52:41,428 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:52:41,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:52:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-11-02 20:52:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2022-11-02 20:52:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.0070298769771528) internal successors, (573), 569 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 573 transitions. [2022-11-02 20:52:41,467 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 573 transitions. Word has length 293 [2022-11-02 20:52:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:52:41,467 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 573 transitions. [2022-11-02 20:52:41,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 573 transitions. [2022-11-02 20:52:41,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2022-11-02 20:52:41,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:52:41,482 INFO L195 NwaCegarLoop]: trace histogram [276, 274, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:41,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-02 20:52:41,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:52:41,706 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:52:41,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:41,707 INFO L85 PathProgramCache]: Analyzing trace with hash -515641074, now seen corresponding path program 9 times [2022-11-02 20:52:41,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:41,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640308971] [2022-11-02 20:52:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:41,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 76231 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-02 20:53:27,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:27,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640308971] [2022-11-02 20:53:27,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640308971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:27,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323383189] [2022-11-02 20:53:27,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:53:27,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:27,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:27,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:27,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:53:27,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 20:53:27,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:27,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:53:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 76231 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74857 trivial. 0 not checked. [2022-11-02 20:53:28,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 76231 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74857 trivial. 0 not checked. [2022-11-02 20:53:28,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323383189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:28,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:28,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 5, 5] total 283 [2022-11-02 20:53:28,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189426899] [2022-11-02 20:53:28,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:28,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 283 states [2022-11-02 20:53:28,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:28,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 283 interpolants. [2022-11-02 20:53:28,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2022-11-02 20:53:28,886 INFO L87 Difference]: Start difference. First operand 570 states and 573 transitions. Second operand has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:31,135 INFO L93 Difference]: Finished difference Result 600 states and 615 transitions. [2022-11-02 20:53:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2022-11-02 20:53:31,136 INFO L78 Accepts]: Start accepts. Automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 0 states have call successors, (0), 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 569 [2022-11-02 20:53:31,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:31,141 INFO L225 Difference]: With dead ends: 600 [2022-11-02 20:53:31,141 INFO L226 Difference]: Without dead ends: 580 [2022-11-02 20:53:31,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1413 GetRequests, 1132 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2022-11-02 20:53:31,148 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 281 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:31,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 24 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:53:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-11-02 20:53:31,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-11-02 20:53:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 1.0138169257340242) internal successors, (587), 579 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 587 transitions. [2022-11-02 20:53:31,195 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 587 transitions. Word has length 569 [2022-11-02 20:53:31,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:31,196 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 587 transitions. [2022-11-02 20:53:31,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:31,198 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 587 transitions. [2022-11-02 20:53:31,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-11-02 20:53:31,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:31,212 INFO L195 NwaCegarLoop]: trace histogram [281, 275, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:31,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:31,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:53:31,434 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:53:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:31,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1449652617, now seen corresponding path program 10 times [2022-11-02 20:53:31,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:31,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875734839] [2022-11-02 20:53:31,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:31,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 79016 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-02 20:54:16,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:16,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875734839] [2022-11-02 20:54:16,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875734839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:16,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202935854] [2022-11-02 20:54:16,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:54:16,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:16,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:16,666 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:16,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d3a0f-943c-477d-bf35-60e4874aaa34/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:54:16,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:54:16,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:16,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 277 conjunts are in the unsatisfiable core [2022-11-02 20:54:16,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 79016 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-02 20:54:17,908 INFO L328 TraceCheckSpWp]: Computing backward predicates...