./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0e55420715ff80c27c9ff14eb8ac6a520210206e33b4fd081fea4bf1c2e05be --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:36:51,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:36:51,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:36:51,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:36:51,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:36:51,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:36:51,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:36:51,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:36:51,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:36:51,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:36:51,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:36:51,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:36:51,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:36:51,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:36:51,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:36:51,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:36:51,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:36:51,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:36:51,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:36:51,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:36:51,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:36:51,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:36:51,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:36:51,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:36:51,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:36:51,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:36:51,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:36:51,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:36:51,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:36:51,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:36:51,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:36:51,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:36:51,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:36:51,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:36:51,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:36:51,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:36:51,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:36:51,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:36:51,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:36:51,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:36:51,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:36:51,752 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:36:51,805 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:36:51,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:36:51,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:36:51,807 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:36:51,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:36:51,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:36:51,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:36:51,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:36:51,810 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:36:51,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:36:51,812 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:36:51,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:36:51,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:36:51,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:36:51,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:36:51,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:36:51,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:36:51,814 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:36:51,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:36:51,815 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:36:51,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:36:51,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:36:51,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:36:51,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:36:51,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:36:51,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:36:51,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:36:51,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:36:51,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:36:51,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:36:51,820 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:36:51,820 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:36:51,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:36:51,821 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_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e55420715ff80c27c9ff14eb8ac6a520210206e33b4fd081fea4bf1c2e05be [2022-11-16 11:36:52,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:36:52,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:36:52,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:36:52,225 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:36:52,226 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:36:52,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/loop-simple/nested_6.c [2022-11-16 11:36:52,340 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/data/939d4bf44/bf39f943c2554801a0ec3b1858ab09ff/FLAG4586a5e46 [2022-11-16 11:36:52,909 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:36:52,910 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/sv-benchmarks/c/loop-simple/nested_6.c [2022-11-16 11:36:52,918 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/data/939d4bf44/bf39f943c2554801a0ec3b1858ab09ff/FLAG4586a5e46 [2022-11-16 11:36:53,252 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/data/939d4bf44/bf39f943c2554801a0ec3b1858ab09ff [2022-11-16 11:36:53,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:36:53,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:36:53,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:36:53,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:36:53,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:36:53,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d8f178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53, skipping insertion in model container [2022-11-16 11:36:53,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:36:53,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:36:53,526 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/sv-benchmarks/c/loop-simple/nested_6.c[959,972] [2022-11-16 11:36:53,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:36:53,563 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:36:53,584 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/sv-benchmarks/c/loop-simple/nested_6.c[959,972] [2022-11-16 11:36:53,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:36:53,608 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:36:53,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53 WrapperNode [2022-11-16 11:36:53,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:36:53,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:36:53,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:36:53,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:36:53,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,653 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2022-11-16 11:36:53,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:36:53,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:36:53,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:36:53,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:36:53,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,680 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:36:53,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:36:53,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:36:53,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:36:53,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53" (1/1) ... [2022-11-16 11:36:53,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:36:53,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:53,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:36:53,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:36:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:36:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:36:53,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:36:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:36:53,899 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:36:53,902 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:36:54,067 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:36:54,074 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:36:54,075 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 11:36:54,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:36:54 BoogieIcfgContainer [2022-11-16 11:36:54,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:36:54,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:36:54,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:36:54,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:36:54,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:36:53" (1/3) ... [2022-11-16 11:36:54,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de3c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:36:54, skipping insertion in model container [2022-11-16 11:36:54,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:53" (2/3) ... [2022-11-16 11:36:54,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de3c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:36:54, skipping insertion in model container [2022-11-16 11:36:54,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:36:54" (3/3) ... [2022-11-16 11:36:54,090 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_6.c [2022-11-16 11:36:54,116 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:36:54,116 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:36:54,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:54,191 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;@10ddd87e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:54,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:36:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:36:54,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:54,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:36:54,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:54,214 INFO L85 PathProgramCache]: Analyzing trace with hash 28698918, now seen corresponding path program 1 times [2022-11-16 11:36:54,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:54,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582397516] [2022-11-16 11:36:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:54,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:54,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:54,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582397516] [2022-11-16 11:36:54,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582397516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:54,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:54,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:54,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099980284] [2022-11-16 11:36:54,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:54,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:54,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:54,505 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:54,596 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2022-11-16 11:36:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:54,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-16 11:36:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:54,611 INFO L225 Difference]: With dead ends: 52 [2022-11-16 11:36:54,611 INFO L226 Difference]: Without dead ends: 29 [2022-11-16 11:36:54,615 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 [2022-11-16 11:36:54,620 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:54,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:36:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-16 11:36:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2022-11-16 11:36:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2022-11-16 11:36:54,664 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 5 [2022-11-16 11:36:54,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:54,665 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2022-11-16 11:36:54,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:54,665 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2022-11-16 11:36:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:36:54,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:54,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:54,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:36:54,667 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:54,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash 270775882, now seen corresponding path program 1 times [2022-11-16 11:36:54,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:54,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455807206] [2022-11-16 11:36:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:54,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:54,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:54,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455807206] [2022-11-16 11:36:54,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455807206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:54,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:54,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:54,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731783642] [2022-11-16 11:36:54,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:54,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:54,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:54,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:54,752 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:54,795 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2022-11-16 11:36:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:54,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:36:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:54,797 INFO L225 Difference]: With dead ends: 43 [2022-11-16 11:36:54,797 INFO L226 Difference]: Without dead ends: 28 [2022-11-16 11:36:54,798 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 [2022-11-16 11:36:54,800 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:54,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:36:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-16 11:36:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2022-11-16 11:36:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-16 11:36:54,808 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2022-11-16 11:36:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:54,808 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-16 11:36:54,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-16 11:36:54,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:36:54,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:54,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:54,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:36:54,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:54,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:54,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1936160826, now seen corresponding path program 1 times [2022-11-16 11:36:54,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:54,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029450941] [2022-11-16 11:36:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:54,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:54,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:54,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029450941] [2022-11-16 11:36:54,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029450941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:54,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:54,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:54,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022093922] [2022-11-16 11:36:54,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:54,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:54,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:54,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:54,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:54,971 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-16 11:36:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:54,991 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2022-11-16 11:36:54,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:54,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) Word has length 11 [2022-11-16 11:36:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:54,993 INFO L225 Difference]: With dead ends: 43 [2022-11-16 11:36:54,993 INFO L226 Difference]: Without dead ends: 27 [2022-11-16 11:36:54,994 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 [2022-11-16 11:36:54,995 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:54,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:36:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-16 11:36:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2022-11-16 11:36:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-16 11:36:55,002 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2022-11-16 11:36:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:55,002 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-16 11:36:55,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-16 11:36:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-16 11:36:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:36:55,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:55,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:55,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:36:55,004 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:55,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:55,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1227454858, now seen corresponding path program 1 times [2022-11-16 11:36:55,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:55,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221107986] [2022-11-16 11:36:55,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:55,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:55,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:55,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221107986] [2022-11-16 11:36:55,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221107986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:55,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:55,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:55,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706476948] [2022-11-16 11:36:55,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:55,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:55,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:55,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:55,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:55,089 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-11-16 11:36:55,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:55,134 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2022-11-16 11:36:55,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:55,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) Word has length 14 [2022-11-16 11:36:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:55,139 INFO L225 Difference]: With dead ends: 43 [2022-11-16 11:36:55,139 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 11:36:55,140 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 [2022-11-16 11:36:55,145 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:55,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:36:55,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 11:36:55,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-11-16 11:36:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2022-11-16 11:36:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-11-16 11:36:55,161 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2022-11-16 11:36:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:55,162 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-11-16 11:36:55,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-11-16 11:36:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-11-16 11:36:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:36:55,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:55,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:55,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:36:55,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:55,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1691120258, now seen corresponding path program 1 times [2022-11-16 11:36:55,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:55,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56014543] [2022-11-16 11:36:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:55,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:55,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:55,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56014543] [2022-11-16 11:36:55,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56014543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:55,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:55,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:55,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622122413] [2022-11-16 11:36:55,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:55,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:55,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:55,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:55,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:55,335 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2022-11-16 11:36:55,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:55,366 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-11-16 11:36:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:55,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 17 [2022-11-16 11:36:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:55,370 INFO L225 Difference]: With dead ends: 43 [2022-11-16 11:36:55,371 INFO L226 Difference]: Without dead ends: 25 [2022-11-16 11:36:55,371 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 [2022-11-16 11:36:55,373 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:55,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:36:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-16 11:36:55,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-16 11:36:55,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:55,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-16 11:36:55,380 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2022-11-16 11:36:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:55,381 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-16 11:36:55,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2022-11-16 11:36:55,382 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-16 11:36:55,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:36:55,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:55,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:55,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:36:55,390 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:55,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:55,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1077656366, now seen corresponding path program 1 times [2022-11-16 11:36:55,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:55,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544830776] [2022-11-16 11:36:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:55,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:55,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:55,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544830776] [2022-11-16 11:36:55,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544830776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:55,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:55,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:36:55,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542785486] [2022-11-16 11:36:55,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:55,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:55,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:55,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:55,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:55,470 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:55,496 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-11-16 11:36:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:36:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:55,498 INFO L225 Difference]: With dead ends: 43 [2022-11-16 11:36:55,499 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 11:36:55,499 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 [2022-11-16 11:36:55,501 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:55,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:36:55,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 11:36:55,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-16 11:36:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-16 11:36:55,509 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2022-11-16 11:36:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:55,510 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-16 11:36:55,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-16 11:36:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:36:55,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:55,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:55,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:36:55,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash -624839792, now seen corresponding path program 1 times [2022-11-16 11:36:55,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:55,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285078915] [2022-11-16 11:36:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:55,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:55,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:55,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285078915] [2022-11-16 11:36:55,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285078915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:55,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839145658] [2022-11-16 11:36:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:55,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:55,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:55,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:55,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:36:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:55,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:36:55,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:55,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:55,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839145658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:55,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:55,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 11:36:55,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277598657] [2022-11-16 11:36:55,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:55,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:36:55,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:36:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:36:55,742 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:55,806 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-11-16 11:36:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:36:55,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-16 11:36:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:55,807 INFO L225 Difference]: With dead ends: 49 [2022-11-16 11:36:55,807 INFO L226 Difference]: Without dead ends: 29 [2022-11-16 11:36:55,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:36:55,809 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:55,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:36:55,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-16 11:36:55,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-16 11:36:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-16 11:36:55,816 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 22 [2022-11-16 11:36:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:55,817 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-16 11:36:55,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-16 11:36:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:36:55,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:55,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:55,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:56,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:56,026 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:56,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:56,027 INFO L85 PathProgramCache]: Analyzing trace with hash -222481718, now seen corresponding path program 2 times [2022-11-16 11:36:56,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:56,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888439885] [2022-11-16 11:36:56,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:56,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:36:56,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:56,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888439885] [2022-11-16 11:36:56,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888439885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:56,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162801895] [2022-11-16 11:36:56,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:36:56,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:56,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:56,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:56,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:36:56,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:56,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:56,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:36:56,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:56,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:56,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162801895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:56,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:56,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2022-11-16 11:36:56,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084305337] [2022-11-16 11:36:56,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:56,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:36:56,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:56,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:36:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:36:56,433 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:56,701 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2022-11-16 11:36:56,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:36:56,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-16 11:36:56,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:56,703 INFO L225 Difference]: With dead ends: 88 [2022-11-16 11:36:56,703 INFO L226 Difference]: Without dead ends: 62 [2022-11-16 11:36:56,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:36:56,705 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:56,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:36:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-16 11:36:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2022-11-16 11:36:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-11-16 11:36:56,715 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 28 [2022-11-16 11:36:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:56,716 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-11-16 11:36:56,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-11-16 11:36:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 11:36:56,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:56,718 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:56,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:56,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:36:56,931 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:56,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:56,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1455035518, now seen corresponding path program 3 times [2022-11-16 11:36:56,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:56,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676799671] [2022-11-16 11:36:56,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:56,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-16 11:36:57,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:57,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676799671] [2022-11-16 11:36:57,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676799671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:57,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455393947] [2022-11-16 11:36:57,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:36:57,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:57,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:57,026 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:57,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:36:57,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:36:57,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:57,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:36:57,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-16 11:36:57,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-16 11:36:57,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455393947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:57,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:57,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-16 11:36:57,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556247844] [2022-11-16 11:36:57,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:57,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:36:57,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:57,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:36:57,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:36:57,332 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:57,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:57,525 INFO L93 Difference]: Finished difference Result 479 states and 540 transitions. [2022-11-16 11:36:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:36:57,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-16 11:36:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:57,534 INFO L225 Difference]: With dead ends: 479 [2022-11-16 11:36:57,534 INFO L226 Difference]: Without dead ends: 434 [2022-11-16 11:36:57,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:36:57,545 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 184 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:57,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 81 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:36:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-16 11:36:57,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 306. [2022-11-16 11:36:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1213114754098361) internal successors, (342), 305 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 342 transitions. [2022-11-16 11:36:57,615 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 342 transitions. Word has length 47 [2022-11-16 11:36:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:57,616 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 342 transitions. [2022-11-16 11:36:57,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:57,617 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 342 transitions. [2022-11-16 11:36:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-11-16 11:36:57,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:57,625 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-16 11:36:57,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:57,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:57,833 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash -107592410, now seen corresponding path program 4 times [2022-11-16 11:36:57,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:57,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568749879] [2022-11-16 11:36:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:57,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 4301 proven. 1 refuted. 0 times theorem prover too weak. 7048 trivial. 0 not checked. [2022-11-16 11:36:58,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:58,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568749879] [2022-11-16 11:36:58,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568749879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:58,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735871956] [2022-11-16 11:36:58,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:36:58,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:58,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:58,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:58,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:36:58,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:36:58,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:58,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:36:58,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 2500 proven. 89 refuted. 0 times theorem prover too weak. 8761 trivial. 0 not checked. [2022-11-16 11:36:58,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 2500 proven. 89 refuted. 0 times theorem prover too weak. 8761 trivial. 0 not checked. [2022-11-16 11:36:58,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735871956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:58,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:58,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-11-16 11:36:58,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439454514] [2022-11-16 11:36:58,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:58,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:36:58,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:58,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:36:58,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:36:58,680 INFO L87 Difference]: Start difference. First operand 306 states and 342 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:59,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:59,176 INFO L93 Difference]: Finished difference Result 2596 states and 2920 transitions. [2022-11-16 11:36:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:36:59,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2022-11-16 11:36:59,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:59,190 INFO L225 Difference]: With dead ends: 2596 [2022-11-16 11:36:59,191 INFO L226 Difference]: Without dead ends: 2294 [2022-11-16 11:36:59,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:36:59,199 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 180 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:59,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 87 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:36:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2022-11-16 11:36:59,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1542. [2022-11-16 11:36:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.0837118754055808) internal successors, (1670), 1541 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 1670 transitions. [2022-11-16 11:36:59,488 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 1670 transitions. Word has length 305 [2022-11-16 11:36:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:59,492 INFO L495 AbstractCegarLoop]: Abstraction has 1542 states and 1670 transitions. [2022-11-16 11:36:59,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 1670 transitions. [2022-11-16 11:36:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1542 [2022-11-16 11:36:59,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:59,627 INFO L195 NwaCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-16 11:36:59,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 11:36:59,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:36:59,833 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:59,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:59,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1672164490, now seen corresponding path program 5 times [2022-11-16 11:36:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:59,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215323237] [2022-11-16 11:36:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:59,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 151174 proven. 1 refuted. 0 times theorem prover too weak. 251197 trivial. 0 not checked. [2022-11-16 11:37:02,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:02,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215323237] [2022-11-16 11:37:02,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215323237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:02,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710588858] [2022-11-16 11:37:02,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:37:02,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:02,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:02,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:02,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:37:03,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2022-11-16 11:37:03,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:03,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:37:03,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 214152 proven. 3149 refuted. 0 times theorem prover too weak. 185071 trivial. 0 not checked. [2022-11-16 11:37:03,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 214152 proven. 3149 refuted. 0 times theorem prover too weak. 185071 trivial. 0 not checked. [2022-11-16 11:37:04,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710588858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:04,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:04,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-11-16 11:37:04,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336420303] [2022-11-16 11:37:04,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:04,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:37:04,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:37:04,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:37:04,239 INFO L87 Difference]: Start difference. First operand 1542 states and 1670 transitions. Second operand has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:06,322 INFO L93 Difference]: Finished difference Result 15052 states and 16328 transitions. [2022-11-16 11:37:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:37:06,323 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 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 1541 [2022-11-16 11:37:06,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:06,380 INFO L225 Difference]: With dead ends: 15052 [2022-11-16 11:37:06,381 INFO L226 Difference]: Without dead ends: 13514 [2022-11-16 11:37:06,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3096 GetRequests, 3076 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:37:06,394 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 234 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:06,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 104 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:37:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13514 states. [2022-11-16 11:37:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13514 to 9018. [2022-11-16 11:37:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 9017 states have (on average 1.0777420428080293) internal successors, (9718), 9017 states have internal predecessors, (9718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:07,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 9718 transitions. [2022-11-16 11:37:07,700 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 9718 transitions. Word has length 1541 [2022-11-16 11:37:07,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:07,701 INFO L495 AbstractCegarLoop]: Abstraction has 9018 states and 9718 transitions. [2022-11-16 11:37:07,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:07,701 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 9718 transitions. [2022-11-16 11:37:08,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9018 [2022-11-16 11:37:08,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:08,455 INFO L195 NwaCegarLoop]: trace histogram [3456, 3456, 576, 576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-16 11:37:08,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:08,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:37:08,663 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:37:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:08,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1229783514, now seen corresponding path program 6 times [2022-11-16 11:37:08,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:08,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143861053] [2022-11-16 11:37:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:08,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172646 proven. 113309 refuted. 0 times theorem prover too weak. 11213119 trivial. 0 not checked. [2022-11-16 11:37:45,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:45,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143861053] [2022-11-16 11:37:45,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143861053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:45,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254865986] [2022-11-16 11:37:45,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:37:45,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:45,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:45,367 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:45,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:37:53,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 755 check-sat command(s) [2022-11-16 11:37:53,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:53,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 5125 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:37:53,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172656 proven. 113309 refuted. 0 times theorem prover too weak. 11213109 trivial. 0 not checked. [2022-11-16 11:37:57,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172656 proven. 113309 refuted. 0 times theorem prover too weak. 11213109 trivial. 0 not checked. [2022-11-16 11:38:00,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254865986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:00,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:00,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-16 11:38:00,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725673558] [2022-11-16 11:38:00,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:00,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:38:00,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:00,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:38:00,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:38:00,036 INFO L87 Difference]: Start difference. First operand 9018 states and 9718 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:02,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:02,039 INFO L93 Difference]: Finished difference Result 34861 states and 37582 transitions. [2022-11-16 11:38:02,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:38:02,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 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 9017 [2022-11-16 11:38:02,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:02,120 INFO L225 Difference]: With dead ends: 34861 [2022-11-16 11:38:02,121 INFO L226 Difference]: Without dead ends: 26970 [2022-11-16 11:38:02,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18037 GetRequests, 18030 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:38:02,135 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:02,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 88 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:38:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26970 states. [2022-11-16 11:38:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26970 to 26970. [2022-11-16 11:38:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26970 states, 26969 states have (on average 1.07701434980904) internal successors, (29046), 26969 states have internal predecessors, (29046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26970 states to 26970 states and 29046 transitions. [2022-11-16 11:38:04,393 INFO L78 Accepts]: Start accepts. Automaton has 26970 states and 29046 transitions. Word has length 9017 [2022-11-16 11:38:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:04,396 INFO L495 AbstractCegarLoop]: Abstraction has 26970 states and 29046 transitions. [2022-11-16 11:38:04,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:04,396 INFO L276 IsEmpty]: Start isEmpty. Operand 26970 states and 29046 transitions. [2022-11-16 11:38:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26970 [2022-11-16 11:38:08,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:08,932 INFO L195 NwaCegarLoop]: trace histogram [10368, 10368, 1728, 1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-16 11:38:08,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:09,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43dfa2e0-d4ef-446b-bd26-0e1ff4481949/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:38:09,133 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:38:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:09,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2046182950, now seen corresponding path program 7 times [2022-11-16 11:38:09,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:09,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144308092] [2022-11-16 11:38:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:09,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat