./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN --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 d617eb63717df2c143c72a2b28226809849fdb6b46ba3b8819c6be91e87f3a08 --- 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-6b4ec56 [2022-11-20 10:52:48,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:52:48,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:52:48,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:52:48,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:52:48,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:52:48,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:52:48,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:52:48,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:52:48,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:52:48,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:52:48,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:52:48,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:52:48,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:52:48,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:52:48,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:52:48,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:52:48,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:52:48,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:52:48,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:52:48,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:52:48,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:52:48,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:52:48,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:52:48,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:52:48,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:52:48,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:52:48,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:52:48,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:52:48,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:52:48,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:52:48,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:52:48,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:52:48,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:52:48,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:52:48,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:52:48,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:52:48,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:52:48,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:52:48,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:52:48,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:52:48,824 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:52:48,870 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:52:48,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:52:48,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:52:48,872 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:52:48,873 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:52:48,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:52:48,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:52:48,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:52:48,875 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:52:48,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:52:48,877 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:52:48,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:52:48,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:52:48,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:52:48,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:52:48,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:52:48,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:52:48,879 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:52:48,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:52:48,880 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:52:48,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:52:48,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:52:48,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:52:48,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:52:48,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:52:48,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:52:48,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:52:48,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:52:48,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:52:48,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:52:48,884 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:52:48,884 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:52:48,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:52:48,885 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_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d617eb63717df2c143c72a2b28226809849fdb6b46ba3b8819c6be91e87f3a08 [2022-11-20 10:52:49,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:52:49,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:52:49,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:52:49,230 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:52:49,231 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:52:49,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2012/Problem17_label11.c [2022-11-20 10:52:52,532 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:52:53,100 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:52:53,101 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/sv-benchmarks/c/eca-rers2012/Problem17_label11.c [2022-11-20 10:52:53,132 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/data/920a679da/226022086b5f486686c6e8f2b189c9c4/FLAGfb0eb9a4f [2022-11-20 10:52:53,154 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/data/920a679da/226022086b5f486686c6e8f2b189c9c4 [2022-11-20 10:52:53,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:52:53,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:52:53,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:52:53,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:52:53,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:52:53,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:52:53" (1/1) ... [2022-11-20 10:52:53,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11bda8d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:53, skipping insertion in model container [2022-11-20 10:52:53,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:52:53" (1/1) ... [2022-11-20 10:52:53,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:52:53,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:52:53,688 WARN L237 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_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/sv-benchmarks/c/eca-rers2012/Problem17_label11.c[8243,8256] [2022-11-20 10:52:54,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:52:54,464 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:52:54,502 WARN L237 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_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/sv-benchmarks/c/eca-rers2012/Problem17_label11.c[8243,8256] [2022-11-20 10:52:54,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:52:54,876 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:52:54,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54 WrapperNode [2022-11-20 10:52:54,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:52:54,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:52:54,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:52:54,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:52:54,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54" (1/1) ... [2022-11-20 10:52:54,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54" (1/1) ... [2022-11-20 10:52:55,274 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-11-20 10:52:55,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:52:55,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:52:55,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:52:55,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:52:55,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54" (1/1) ... [2022-11-20 10:52:55,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54" (1/1) ... [2022-11-20 10:52:55,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54" (1/1) ... [2022-11-20 10:52:55,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54" (1/1) ... [2022-11-20 10:52:55,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54" (1/1) ... [2022-11-20 10:52:55,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54" (1/1) ... [2022-11-20 10:52:55,650 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54" (1/1) ... [2022-11-20 10:52:55,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54" (1/1) ... [2022-11-20 10:52:55,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:52:55,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:52:55,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:52:55,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:52:55,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54" (1/1) ... [2022-11-20 10:52:55,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:52:55,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:55,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:52:55,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:52:55,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:52:55,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:52:55,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:52:55,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:52:55,952 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:52:55,961 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:53:00,434 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:53:00,449 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:53:00,449 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 10:53:00,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:53:00 BoogieIcfgContainer [2022-11-20 10:53:00,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:53:00,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:53:00,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:53:00,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:53:00,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:52:53" (1/3) ... [2022-11-20 10:53:00,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f2c1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:53:00, skipping insertion in model container [2022-11-20 10:53:00,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:52:54" (2/3) ... [2022-11-20 10:53:00,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f2c1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:53:00, skipping insertion in model container [2022-11-20 10:53:00,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:53:00" (3/3) ... [2022-11-20 10:53:00,465 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label11.c [2022-11-20 10:53:00,490 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:53:00,490 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:53:00,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:53:00,578 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;@55f69a53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:53:00,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:53:00,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 10:53:00,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:00,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:00,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2158734, now seen corresponding path program 1 times [2022-11-20 10:53:00,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:00,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237172051] [2022-11-20 10:53:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:00,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:01,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:01,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237172051] [2022-11-20 10:53:01,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237172051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:01,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:01,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:01,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406009746] [2022-11-20 10:53:01,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:01,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:01,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:01,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:01,181 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:05,009 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2022-11-20 10:53:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:05,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-20 10:53:05,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:05,030 INFO L225 Difference]: With dead ends: 1642 [2022-11-20 10:53:05,030 INFO L226 Difference]: Without dead ends: 975 [2022-11-20 10:53:05,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:05,039 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 434 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:05,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-20 10:53:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-11-20 10:53:05,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2022-11-20 10:53:05,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2022-11-20 10:53:05,118 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 56 [2022-11-20 10:53:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:05,119 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2022-11-20 10:53:05,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2022-11-20 10:53:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-20 10:53:05,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:05,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:05,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:53:05,124 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:05,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1429655906, now seen corresponding path program 1 times [2022-11-20 10:53:05,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:05,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330128608] [2022-11-20 10:53:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:05,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:05,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:05,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330128608] [2022-11-20 10:53:05,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330128608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:05,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:05,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:05,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988174556] [2022-11-20 10:53:05,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:05,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:05,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:05,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:05,550 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:09,081 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2022-11-20 10:53:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:09,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2022-11-20 10:53:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:09,096 INFO L225 Difference]: With dead ends: 2814 [2022-11-20 10:53:09,096 INFO L226 Difference]: Without dead ends: 1844 [2022-11-20 10:53:09,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:09,107 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 435 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:09,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 10:53:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-11-20 10:53:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2022-11-20 10:53:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2022-11-20 10:53:09,184 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 126 [2022-11-20 10:53:09,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:09,188 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2022-11-20 10:53:09,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2022-11-20 10:53:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-20 10:53:09,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:09,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:09,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:53:09,206 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:09,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash -58398847, now seen corresponding path program 1 times [2022-11-20 10:53:09,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:09,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099282171] [2022-11-20 10:53:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:09,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:09,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099282171] [2022-11-20 10:53:09,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099282171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:09,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:09,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:09,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955743841] [2022-11-20 10:53:09,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:09,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:09,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:09,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:09,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:09,370 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:12,251 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2022-11-20 10:53:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:12,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2022-11-20 10:53:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:12,264 INFO L225 Difference]: With dead ends: 5395 [2022-11-20 10:53:12,264 INFO L226 Difference]: Without dead ends: 2701 [2022-11-20 10:53:12,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:12,276 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:12,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 10:53:12,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-11-20 10:53:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2022-11-20 10:53:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:12,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2022-11-20 10:53:12,339 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 148 [2022-11-20 10:53:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:12,340 INFO L495 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2022-11-20 10:53:12,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2022-11-20 10:53:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-20 10:53:12,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:12,346 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:12,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:53:12,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:12,349 INFO L85 PathProgramCache]: Analyzing trace with hash 886311573, now seen corresponding path program 1 times [2022-11-20 10:53:12,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:12,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958431928] [2022-11-20 10:53:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:12,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:12,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:12,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958431928] [2022-11-20 10:53:12,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958431928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:12,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:12,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:12,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772097823] [2022-11-20 10:53:12,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:12,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:12,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:12,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:12,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:12,699 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:15,100 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2022-11-20 10:53:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:15,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2022-11-20 10:53:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:15,116 INFO L225 Difference]: With dead ends: 7108 [2022-11-20 10:53:15,116 INFO L226 Difference]: Without dead ends: 4409 [2022-11-20 10:53:15,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:15,121 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:15,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 10:53:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2022-11-20 10:53:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2022-11-20 10:53:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2022-11-20 10:53:15,216 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 208 [2022-11-20 10:53:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:15,217 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2022-11-20 10:53:15,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2022-11-20 10:53:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-20 10:53:15,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:15,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:15,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:53:15,221 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1180956656, now seen corresponding path program 1 times [2022-11-20 10:53:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:15,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425388644] [2022-11-20 10:53:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:15,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-20 10:53:15,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:15,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425388644] [2022-11-20 10:53:15,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425388644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:15,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:15,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:15,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891903959] [2022-11-20 10:53:15,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:15,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:15,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:15,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:15,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:15,510 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:18,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:18,277 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2022-11-20 10:53:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:18,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 210 [2022-11-20 10:53:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:18,303 INFO L225 Difference]: With dead ends: 10936 [2022-11-20 10:53:18,303 INFO L226 Difference]: Without dead ends: 6528 [2022-11-20 10:53:18,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:18,309 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 395 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:18,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 10:53:18,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2022-11-20 10:53:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2022-11-20 10:53:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2022-11-20 10:53:18,421 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 210 [2022-11-20 10:53:18,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:18,423 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2022-11-20 10:53:18,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2022-11-20 10:53:18,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-11-20 10:53:18,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:18,432 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:18,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:53:18,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:18,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:18,433 INFO L85 PathProgramCache]: Analyzing trace with hash 17300182, now seen corresponding path program 1 times [2022-11-20 10:53:18,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:18,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307603957] [2022-11-20 10:53:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:18,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 10:53:18,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:18,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307603957] [2022-11-20 10:53:18,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307603957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:18,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:18,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:18,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394193889] [2022-11-20 10:53:18,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:18,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:18,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:18,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:18,919 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:21,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:21,776 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2022-11-20 10:53:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:21,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 276 [2022-11-20 10:53:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:21,803 INFO L225 Difference]: With dead ends: 10045 [2022-11-20 10:53:21,803 INFO L226 Difference]: Without dead ends: 5665 [2022-11-20 10:53:21,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:21,811 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 380 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:21,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 10:53:21,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2022-11-20 10:53:21,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2022-11-20 10:53:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2022-11-20 10:53:21,908 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 276 [2022-11-20 10:53:21,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:21,909 INFO L495 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2022-11-20 10:53:21,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2022-11-20 10:53:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-20 10:53:21,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:21,915 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:21,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:53:21,915 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:21,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1294482893, now seen corresponding path program 1 times [2022-11-20 10:53:21,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:21,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036386368] [2022-11-20 10:53:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:21,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 10:53:22,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:22,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036386368] [2022-11-20 10:53:22,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036386368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:22,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:22,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:22,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247313082] [2022-11-20 10:53:22,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:22,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:22,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:22,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:22,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:22,417 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:25,302 INFO L93 Difference]: Finished difference Result 13049 states and 15222 transitions. [2022-11-20 10:53:25,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:25,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 288 [2022-11-20 10:53:25,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:25,375 INFO L225 Difference]: With dead ends: 13049 [2022-11-20 10:53:25,376 INFO L226 Difference]: Without dead ends: 6942 [2022-11-20 10:53:25,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:25,388 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 493 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:25,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 630 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 10:53:25,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2022-11-20 10:53:25,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 6512. [2022-11-20 10:53:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6511 states have (on average 1.1520503762862848) internal successors, (7501), 6511 states have internal predecessors, (7501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 7501 transitions. [2022-11-20 10:53:25,518 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 7501 transitions. Word has length 288 [2022-11-20 10:53:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:25,519 INFO L495 AbstractCegarLoop]: Abstraction has 6512 states and 7501 transitions. [2022-11-20 10:53:25,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 7501 transitions. [2022-11-20 10:53:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-20 10:53:25,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:25,527 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:25,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:53:25,527 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:25,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2010645672, now seen corresponding path program 1 times [2022-11-20 10:53:25,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:25,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797059710] [2022-11-20 10:53:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:25,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 10:53:25,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:25,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797059710] [2022-11-20 10:53:25,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797059710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:25,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:25,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:25,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323141058] [2022-11-20 10:53:25,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:25,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:25,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:25,971 INFO L87 Difference]: Start difference. First operand 6512 states and 7501 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:28,548 INFO L93 Difference]: Finished difference Result 16010 states and 18477 transitions. [2022-11-20 10:53:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:28,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 311 [2022-11-20 10:53:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:28,569 INFO L225 Difference]: With dead ends: 16010 [2022-11-20 10:53:28,569 INFO L226 Difference]: Without dead ends: 9500 [2022-11-20 10:53:28,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:28,576 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 416 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:28,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 337 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 10:53:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9500 states. [2022-11-20 10:53:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9500 to 8644. [2022-11-20 10:53:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8643 states have (on average 1.1545759574221914) internal successors, (9979), 8643 states have internal predecessors, (9979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:28,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 9979 transitions. [2022-11-20 10:53:28,712 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 9979 transitions. Word has length 311 [2022-11-20 10:53:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:28,712 INFO L495 AbstractCegarLoop]: Abstraction has 8644 states and 9979 transitions. [2022-11-20 10:53:28,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 9979 transitions. [2022-11-20 10:53:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-11-20 10:53:28,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:28,720 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:28,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:53:28,720 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:28,721 INFO L85 PathProgramCache]: Analyzing trace with hash -305663653, now seen corresponding path program 1 times [2022-11-20 10:53:28,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:28,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563546848] [2022-11-20 10:53:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:28,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 314 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:29,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:29,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563546848] [2022-11-20 10:53:29,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563546848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:29,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116455153] [2022-11-20 10:53:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:29,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:29,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:29,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:29,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:53:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:29,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:53:29,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 250 proven. 82 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-20 10:53:30,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 250 proven. 82 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-20 10:53:31,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116455153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:31,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:31,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-11-20 10:53:31,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384038970] [2022-11-20 10:53:31,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:31,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:53:31,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:31,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:53:31,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:53:31,999 INFO L87 Difference]: Start difference. First operand 8644 states and 9979 transitions. Second operand has 9 states, 9 states have (on average 85.22222222222223) internal successors, (767), 9 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:53,292 INFO L93 Difference]: Finished difference Result 54417 states and 62746 transitions. [2022-11-20 10:53:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 10:53:53,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 85.22222222222223) internal successors, (767), 9 states have internal predecessors, (767), 0 states have call successors, (0), 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 316 [2022-11-20 10:53:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:53,412 INFO L225 Difference]: With dead ends: 54417 [2022-11-20 10:53:53,412 INFO L226 Difference]: Without dead ends: 43221 [2022-11-20 10:53:53,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:53:53,426 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 9690 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 15304 mSolverCounterSat, 2247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9690 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 17551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2247 IncrementalHoareTripleChecker+Valid, 15304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:53,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9690 Valid, 588 Invalid, 17551 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2247 Valid, 15304 Invalid, 0 Unknown, 0 Unchecked, 20.2s Time] [2022-11-20 10:53:53,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43221 states. [2022-11-20 10:53:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43221 to 38493. [2022-11-20 10:53:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38493 states, 38492 states have (on average 1.1294035124181647) internal successors, (43473), 38492 states have internal predecessors, (43473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38493 states to 38493 states and 43473 transitions. [2022-11-20 10:53:54,044 INFO L78 Accepts]: Start accepts. Automaton has 38493 states and 43473 transitions. Word has length 316 [2022-11-20 10:53:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:54,045 INFO L495 AbstractCegarLoop]: Abstraction has 38493 states and 43473 transitions. [2022-11-20 10:53:54,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 85.22222222222223) internal successors, (767), 9 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 38493 states and 43473 transitions. [2022-11-20 10:53:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-11-20 10:53:54,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:54,060 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:54,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 10:53:54,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:54,266 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1189760600, now seen corresponding path program 1 times [2022-11-20 10:53:54,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:54,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226329709] [2022-11-20 10:53:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:54,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 10:53:54,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:54,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226329709] [2022-11-20 10:53:54,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226329709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:54,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:54,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:54,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003900384] [2022-11-20 10:53:54,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:54,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:54,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:54,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:54,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:54,676 INFO L87 Difference]: Start difference. First operand 38493 states and 43473 transitions. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:57,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:57,180 INFO L93 Difference]: Finished difference Result 82934 states and 94025 transitions. [2022-11-20 10:53:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:57,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 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 431 [2022-11-20 10:53:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:57,274 INFO L225 Difference]: With dead ends: 82934 [2022-11-20 10:53:57,291 INFO L226 Difference]: Without dead ends: 44868 [2022-11-20 10:53:57,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:57,335 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 359 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:57,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 795 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 10:53:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44868 states. [2022-11-20 10:53:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44868 to 41043. [2022-11-20 10:53:58,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41043 states, 41042 states have (on average 1.126699478582915) internal successors, (46242), 41042 states have internal predecessors, (46242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41043 states to 41043 states and 46242 transitions. [2022-11-20 10:53:58,077 INFO L78 Accepts]: Start accepts. Automaton has 41043 states and 46242 transitions. Word has length 431 [2022-11-20 10:53:58,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:58,078 INFO L495 AbstractCegarLoop]: Abstraction has 41043 states and 46242 transitions. [2022-11-20 10:53:58,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 41043 states and 46242 transitions. [2022-11-20 10:53:58,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2022-11-20 10:53:58,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:58,087 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:58,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:53:58,087 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1080650673, now seen corresponding path program 1 times [2022-11-20 10:53:58,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:58,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161894047] [2022-11-20 10:53:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:58,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 361 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-11-20 10:53:58,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:58,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161894047] [2022-11-20 10:53:58,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161894047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:58,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:58,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:58,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272933107] [2022-11-20 10:53:58,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:58,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:58,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:58,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:58,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:58,493 INFO L87 Difference]: Start difference. First operand 41043 states and 46242 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:00,285 INFO L93 Difference]: Finished difference Result 81222 states and 91401 transitions. [2022-11-20 10:54:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:54:00,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 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 462 [2022-11-20 10:54:00,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:00,350 INFO L225 Difference]: With dead ends: 81222 [2022-11-20 10:54:00,351 INFO L226 Difference]: Without dead ends: 40605 [2022-11-20 10:54:00,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:00,379 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 632 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:00,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 107 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 10:54:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40605 states. [2022-11-20 10:54:00,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40605 to 39747. [2022-11-20 10:54:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39747 states, 39746 states have (on average 1.1203894731545312) internal successors, (44531), 39746 states have internal predecessors, (44531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39747 states to 39747 states and 44531 transitions. [2022-11-20 10:54:00,925 INFO L78 Accepts]: Start accepts. Automaton has 39747 states and 44531 transitions. Word has length 462 [2022-11-20 10:54:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:00,926 INFO L495 AbstractCegarLoop]: Abstraction has 39747 states and 44531 transitions. [2022-11-20 10:54:00,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 39747 states and 44531 transitions. [2022-11-20 10:54:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-11-20 10:54:00,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:00,939 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:00,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 10:54:00,939 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:00,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:00,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2063282460, now seen corresponding path program 1 times [2022-11-20 10:54:00,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:00,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574694702] [2022-11-20 10:54:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:00,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 428 proven. 82 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-20 10:54:02,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:02,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574694702] [2022-11-20 10:54:02,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574694702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:02,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955088208] [2022-11-20 10:54:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:02,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:02,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:02,214 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:02,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:54:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:02,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:54:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 428 proven. 82 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-20 10:54:03,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-20 10:54:03,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955088208] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:03,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:03,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-11-20 10:54:03,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156667968] [2022-11-20 10:54:03,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:03,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:54:03,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:03,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:54:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:03,657 INFO L87 Difference]: Start difference. First operand 39747 states and 44531 transitions. Second operand has 4 states, 4 states have (on average 96.75) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:08,037 INFO L93 Difference]: Finished difference Result 108443 states and 120794 transitions. [2022-11-20 10:54:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:54:08,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 96.75) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 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 511 [2022-11-20 10:54:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:08,111 INFO L225 Difference]: With dead ends: 108443 [2022-11-20 10:54:08,112 INFO L226 Difference]: Without dead ends: 69123 [2022-11-20 10:54:08,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1023 GetRequests, 1017 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:08,137 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 818 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:08,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 111 Invalid, 2434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 1874 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-20 10:54:08,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69123 states. [2022-11-20 10:54:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69123 to 64823. [2022-11-20 10:54:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64823 states, 64822 states have (on average 1.1061676591280738) internal successors, (71704), 64822 states have internal predecessors, (71704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:09,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64823 states to 64823 states and 71704 transitions. [2022-11-20 10:54:09,544 INFO L78 Accepts]: Start accepts. Automaton has 64823 states and 71704 transitions. Word has length 511 [2022-11-20 10:54:09,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:09,545 INFO L495 AbstractCegarLoop]: Abstraction has 64823 states and 71704 transitions. [2022-11-20 10:54:09,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.75) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 64823 states and 71704 transitions. [2022-11-20 10:54:09,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2022-11-20 10:54:09,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:09,561 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:09,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:09,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 10:54:09,767 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1917370177, now seen corresponding path program 1 times [2022-11-20 10:54:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:09,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365581311] [2022-11-20 10:54:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 750 proven. 72 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-20 10:54:11,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:11,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365581311] [2022-11-20 10:54:11,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365581311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:11,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150216052] [2022-11-20 10:54:11,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:11,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:11,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:11,160 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:11,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:54:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:11,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:54:11,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 582 proven. 216 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-20 10:54:12,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2022-11-20 10:54:12,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150216052] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:12,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:12,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2022-11-20 10:54:12,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072906013] [2022-11-20 10:54:12,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:12,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:54:12,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:54:12,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:54:12,875 INFO L87 Difference]: Start difference. First operand 64823 states and 71704 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:15,957 INFO L93 Difference]: Finished difference Result 144539 states and 159618 transitions. [2022-11-20 10:54:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:54:15,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 520 [2022-11-20 10:54:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:16,035 INFO L225 Difference]: With dead ends: 144539 [2022-11-20 10:54:16,036 INFO L226 Difference]: Without dead ends: 79718 [2022-11-20 10:54:16,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:54:16,063 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 389 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:16,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 765 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 10:54:16,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79718 states. [2022-11-20 10:54:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79718 to 76292. [2022-11-20 10:54:17,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76292 states, 76291 states have (on average 1.0902989867743247) internal successors, (83180), 76291 states have internal predecessors, (83180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76292 states to 76292 states and 83180 transitions. [2022-11-20 10:54:17,328 INFO L78 Accepts]: Start accepts. Automaton has 76292 states and 83180 transitions. Word has length 520 [2022-11-20 10:54:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:17,329 INFO L495 AbstractCegarLoop]: Abstraction has 76292 states and 83180 transitions. [2022-11-20 10:54:17,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 76292 states and 83180 transitions. [2022-11-20 10:54:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-11-20 10:54:17,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:17,347 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:17,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:17,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:17,551 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1210352750, now seen corresponding path program 1 times [2022-11-20 10:54:17,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:17,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721173856] [2022-11-20 10:54:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:17,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 828 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-20 10:54:18,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721173856] [2022-11-20 10:54:18,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721173856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:18,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:18,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:54:18,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359436893] [2022-11-20 10:54:18,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:18,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:54:18,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:18,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:54:18,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:54:18,820 INFO L87 Difference]: Start difference. First operand 76292 states and 83180 transitions. Second operand has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:23,246 INFO L93 Difference]: Finished difference Result 179843 states and 195351 transitions. [2022-11-20 10:54:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:54:23,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 526 [2022-11-20 10:54:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:23,350 INFO L225 Difference]: With dead ends: 179843 [2022-11-20 10:54:23,350 INFO L226 Difference]: Without dead ends: 103978 [2022-11-20 10:54:23,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:54:23,370 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 841 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:23,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 179 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 10:54:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103978 states. [2022-11-20 10:54:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103978 to 99295. [2022-11-20 10:54:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99295 states, 99294 states have (on average 1.084375692388261) internal successors, (107672), 99294 states have internal predecessors, (107672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:25,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99295 states to 99295 states and 107672 transitions. [2022-11-20 10:54:25,012 INFO L78 Accepts]: Start accepts. Automaton has 99295 states and 107672 transitions. Word has length 526 [2022-11-20 10:54:25,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:25,012 INFO L495 AbstractCegarLoop]: Abstraction has 99295 states and 107672 transitions. [2022-11-20 10:54:25,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 99295 states and 107672 transitions. [2022-11-20 10:54:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-11-20 10:54:25,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:25,021 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:25,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 10:54:25,022 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash 323715883, now seen corresponding path program 1 times [2022-11-20 10:54:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:25,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479689300] [2022-11-20 10:54:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:25,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 785 proven. 89 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-20 10:54:26,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:26,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479689300] [2022-11-20 10:54:26,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479689300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:26,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491625779] [2022-11-20 10:54:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:26,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:26,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:26,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:26,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:54:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:26,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:54:26,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 785 proven. 89 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-20 10:54:27,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 874 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-20 10:54:28,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491625779] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:28,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:28,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-20 10:54:28,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137959473] [2022-11-20 10:54:28,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:28,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:28,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:28,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:28,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:54:28,933 INFO L87 Difference]: Start difference. First operand 99295 states and 107672 transitions. Second operand has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:31,894 INFO L93 Difference]: Finished difference Result 221192 states and 239753 transitions. [2022-11-20 10:54:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:54:31,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 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 537 [2022-11-20 10:54:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:32,018 INFO L225 Difference]: With dead ends: 221192 [2022-11-20 10:54:32,018 INFO L226 Difference]: Without dead ends: 121474 [2022-11-20 10:54:32,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1077 GetRequests, 1068 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:54:32,043 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 1529 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 873 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:32,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1529 Valid, 839 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1089 Invalid, 0 Unknown, 873 Unchecked, 2.0s Time] [2022-11-20 10:54:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121474 states. [2022-11-20 10:54:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121474 to 121429. [2022-11-20 10:54:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121429 states, 121428 states have (on average 1.0831933326745067) internal successors, (131530), 121428 states have internal predecessors, (131530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121429 states to 121429 states and 131530 transitions. [2022-11-20 10:54:33,707 INFO L78 Accepts]: Start accepts. Automaton has 121429 states and 131530 transitions. Word has length 537 [2022-11-20 10:54:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:33,708 INFO L495 AbstractCegarLoop]: Abstraction has 121429 states and 131530 transitions. [2022-11-20 10:54:33,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 121429 states and 131530 transitions. [2022-11-20 10:54:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2022-11-20 10:54:33,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:33,718 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:33,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:33,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:33,919 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:33,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2133471930, now seen corresponding path program 1 times [2022-11-20 10:54:33,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:33,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871584503] [2022-11-20 10:54:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:33,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 628 proven. 0 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2022-11-20 10:54:35,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:35,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871584503] [2022-11-20 10:54:35,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871584503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:35,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:35,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:54:35,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301926283] [2022-11-20 10:54:35,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:35,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:54:35,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:35,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:54:35,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:54:35,048 INFO L87 Difference]: Start difference. First operand 121429 states and 131530 transitions. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:40,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:40,006 INFO L93 Difference]: Finished difference Result 292690 states and 316136 transitions. [2022-11-20 10:54:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:54:40,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 553 [2022-11-20 10:54:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:40,213 INFO L225 Difference]: With dead ends: 292690 [2022-11-20 10:54:40,213 INFO L226 Difference]: Without dead ends: 170836 [2022-11-20 10:54:40,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:54:40,265 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 886 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:40,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 189 Invalid, 2761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-20 10:54:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170836 states. [2022-11-20 10:54:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170836 to 169532. [2022-11-20 10:54:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169532 states, 169531 states have (on average 1.0782039862915926) internal successors, (182789), 169531 states have internal predecessors, (182789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169532 states to 169532 states and 182789 transitions. [2022-11-20 10:54:43,302 INFO L78 Accepts]: Start accepts. Automaton has 169532 states and 182789 transitions. Word has length 553 [2022-11-20 10:54:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:43,303 INFO L495 AbstractCegarLoop]: Abstraction has 169532 states and 182789 transitions. [2022-11-20 10:54:43,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 169532 states and 182789 transitions. [2022-11-20 10:54:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-11-20 10:54:43,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:43,319 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:43,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 10:54:43,319 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:43,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1584519061, now seen corresponding path program 1 times [2022-11-20 10:54:43,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:43,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383918260] [2022-11-20 10:54:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:43,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 790 proven. 175 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-20 10:54:44,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:44,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383918260] [2022-11-20 10:54:44,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383918260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:44,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471077680] [2022-11-20 10:54:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:44,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:44,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:44,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:44,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:54:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:44,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:54:44,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 965 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-20 10:54:45,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:45,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471077680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:45,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:54:45,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-20 10:54:45,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301145752] [2022-11-20 10:54:45,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:45,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:54:45,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:45,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:54:45,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:54:45,667 INFO L87 Difference]: Start difference. First operand 169532 states and 182789 transitions. Second operand has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:49,890 INFO L93 Difference]: Finished difference Result 347150 states and 374001 transitions. [2022-11-20 10:54:49,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:54:49,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 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 555 [2022-11-20 10:54:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:50,158 INFO L225 Difference]: With dead ends: 347150 [2022-11-20 10:54:50,159 INFO L226 Difference]: Without dead ends: 178045 [2022-11-20 10:54:50,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:54:50,224 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 793 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:50,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 294 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 10:54:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178045 states. [2022-11-20 10:54:52,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178045 to 175061. [2022-11-20 10:54:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175061 states, 175060 states have (on average 1.0755798012110134) internal successors, (188291), 175060 states have internal predecessors, (188291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175061 states to 175061 states and 188291 transitions. [2022-11-20 10:54:52,950 INFO L78 Accepts]: Start accepts. Automaton has 175061 states and 188291 transitions. Word has length 555 [2022-11-20 10:54:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:52,951 INFO L495 AbstractCegarLoop]: Abstraction has 175061 states and 188291 transitions. [2022-11-20 10:54:52,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 175061 states and 188291 transitions. [2022-11-20 10:54:52,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2022-11-20 10:54:52,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:52,964 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:52,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:53,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a474db2-cb3e-41ad-a2cb-4b43a624e10a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:53,165 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:53,166 INFO L85 PathProgramCache]: Analyzing trace with hash -547097638, now seen corresponding path program 1 times [2022-11-20 10:54:53,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:53,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340714080] [2022-11-20 10:54:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:53,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 435 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-11-20 10:54:54,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:54,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340714080] [2022-11-20 10:54:54,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340714080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:54,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:54,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:54,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797254368] [2022-11-20 10:54:54,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:54,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:54:54,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:54:54,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:54,096 INFO L87 Difference]: Start difference. First operand 175061 states and 188291 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:57,765 INFO L93 Difference]: Finished difference Result 354792 states and 381622 transitions. [2022-11-20 10:54:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:54:57,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 570 [2022-11-20 10:54:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:57,950 INFO L225 Difference]: With dead ends: 354792 [2022-11-20 10:54:57,951 INFO L226 Difference]: Without dead ends: 180158 [2022-11-20 10:54:57,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:57,998 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 487 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:57,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 690 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 10:54:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180158 states. [2022-11-20 10:55:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180158 to 179304. [2022-11-20 10:55:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179304 states, 179303 states have (on average 1.072251998014534) internal successors, (192258), 179303 states have internal predecessors, (192258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179304 states to 179304 states and 192258 transitions. [2022-11-20 10:55:01,473 INFO L78 Accepts]: Start accepts. Automaton has 179304 states and 192258 transitions. Word has length 570 [2022-11-20 10:55:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:01,474 INFO L495 AbstractCegarLoop]: Abstraction has 179304 states and 192258 transitions. [2022-11-20 10:55:01,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 179304 states and 192258 transitions. [2022-11-20 10:55:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2022-11-20 10:55:01,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:01,493 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:01,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 10:55:01,495 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:01,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:01,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1521864693, now seen corresponding path program 1 times [2022-11-20 10:55:01,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:01,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31006950] [2022-11-20 10:55:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:01,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2022-11-20 10:55:02,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:02,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31006950] [2022-11-20 10:55:02,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31006950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:02,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:02,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:55:02,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083062342] [2022-11-20 10:55:02,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:02,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:55:02,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:02,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:55:02,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:55:02,334 INFO L87 Difference]: Start difference. First operand 179304 states and 192258 transitions. Second operand has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)