./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/pipeline.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/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_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/pipeline.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/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_da380163-e744-4d9e-9423-0d6e26ce8d24/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 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 --- 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 10:37:52,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:37:52,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:37:52,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:37:52,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:37:52,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:37:52,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:37:52,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:37:52,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:37:52,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:37:52,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:37:52,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:37:52,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:37:52,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:37:52,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:37:52,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:37:52,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:37:52,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:37:52,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:37:52,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:37:52,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:37:52,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:37:52,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:37:52,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:37:52,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:37:52,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:37:52,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:37:52,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:37:52,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:37:52,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:37:52,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:37:52,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:37:52,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:37:52,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:37:52,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:37:52,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:37:52,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:37:52,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:37:52,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:37:52,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:37:52,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:37:52,219 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:37:52,237 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:37:52,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:37:52,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:37:52,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:37:52,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:37:52,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:37:52,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:37:52,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:37:52,239 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:37:52,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:37:52,240 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:37:52,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:37:52,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:37:52,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:37:52,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:37:52,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:37:52,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:37:52,241 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:37:52,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:37:52,241 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:37:52,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:37:52,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:37:52,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:37:52,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:37:52,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:37:52,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:37:52,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:37:52,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:37:52,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:37:52,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:37:52,243 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:37:52,243 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:37:52,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:37:52,244 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_da380163-e744-4d9e-9423-0d6e26ce8d24/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 [2022-11-20 10:37:52,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:37:52,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:37:52,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:37:52,536 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:37:52,537 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:37:52,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/systemc/pipeline.cil-1.c [2022-11-20 10:37:55,484 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:37:55,802 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:37:55,803 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/sv-benchmarks/c/systemc/pipeline.cil-1.c [2022-11-20 10:37:55,822 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/data/bde06b637/e1546ff32c5d454ea22b65e13a5f1b22/FLAGac6cab5a2 [2022-11-20 10:37:55,844 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/data/bde06b637/e1546ff32c5d454ea22b65e13a5f1b22 [2022-11-20 10:37:55,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:37:55,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:37:55,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:37:55,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:37:55,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:37:55,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:37:55" (1/1) ... [2022-11-20 10:37:55,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29116958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:55, skipping insertion in model container [2022-11-20 10:37:55,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:37:55" (1/1) ... [2022-11-20 10:37:55,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:37:55,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:37:56,097 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_da380163-e744-4d9e-9423-0d6e26ce8d24/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2022-11-20 10:37:56,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:37:56,198 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:37:56,210 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_da380163-e744-4d9e-9423-0d6e26ce8d24/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2022-11-20 10:37:56,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:37:56,292 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:37:56,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56 WrapperNode [2022-11-20 10:37:56,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:37:56,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:37:56,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:37:56,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:37:56,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56" (1/1) ... [2022-11-20 10:37:56,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56" (1/1) ... [2022-11-20 10:37:56,347 INFO L138 Inliner]: procedures = 20, calls = 17, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 422 [2022-11-20 10:37:56,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:37:56,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:37:56,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:37:56,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:37:56,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56" (1/1) ... [2022-11-20 10:37:56,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56" (1/1) ... [2022-11-20 10:37:56,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56" (1/1) ... [2022-11-20 10:37:56,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56" (1/1) ... [2022-11-20 10:37:56,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56" (1/1) ... [2022-11-20 10:37:56,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56" (1/1) ... [2022-11-20 10:37:56,387 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56" (1/1) ... [2022-11-20 10:37:56,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56" (1/1) ... [2022-11-20 10:37:56,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:37:56,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:37:56,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:37:56,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:37:56,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56" (1/1) ... [2022-11-20 10:37:56,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:37:56,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:37:56,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:37:56,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:37:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:37:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:37:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2022-11-20 10:37:56,476 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2022-11-20 10:37:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:37:56,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:37:56,570 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:37:56,573 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:37:57,193 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:37:57,203 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:37:57,204 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 10:37:57,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:37:57 BoogieIcfgContainer [2022-11-20 10:37:57,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:37:57,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:37:57,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:37:57,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:37:57,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:37:55" (1/3) ... [2022-11-20 10:37:57,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da56fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:37:57, skipping insertion in model container [2022-11-20 10:37:57,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:37:56" (2/3) ... [2022-11-20 10:37:57,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da56fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:37:57, skipping insertion in model container [2022-11-20 10:37:57,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:37:57" (3/3) ... [2022-11-20 10:37:57,217 INFO L112 eAbstractionObserver]: Analyzing ICFG pipeline.cil-1.c [2022-11-20 10:37:57,240 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:37:57,241 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:37:57,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:37:57,327 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;@4a0e9249, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:37:57,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:37:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 151 states have (on average 1.781456953642384) internal successors, (269), 153 states have internal predecessors, (269), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:37:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-20 10:37:57,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:57,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:57,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:37:57,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:57,362 INFO L85 PathProgramCache]: Analyzing trace with hash -827879702, now seen corresponding path program 1 times [2022-11-20 10:37:57,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:37:57,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816822611] [2022-11-20 10:37:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:37:57,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:37:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:58,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:37:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:58,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 10:37:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:37:58,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:37:58,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816822611] [2022-11-20 10:37:58,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816822611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:37:58,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:37:58,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:37:58,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834837813] [2022-11-20 10:37:58,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:37:58,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:37:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:37:58,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:37:58,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:37:58,348 INFO L87 Difference]: Start difference. First operand has 157 states, 151 states have (on average 1.781456953642384) internal successors, (269), 153 states have internal predecessors, (269), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:37:59,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:59,598 INFO L93 Difference]: Finished difference Result 498 states and 888 transitions. [2022-11-20 10:37:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:37:59,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2022-11-20 10:37:59,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:59,620 INFO L225 Difference]: With dead ends: 498 [2022-11-20 10:37:59,621 INFO L226 Difference]: Without dead ends: 344 [2022-11-20 10:37:59,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:37:59,631 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 335 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:59,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 531 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 10:37:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-20 10:37:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 152. [2022-11-20 10:37:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.7551020408163265) internal successors, (258), 148 states have internal predecessors, (258), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:37:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 264 transitions. [2022-11-20 10:37:59,697 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 264 transitions. Word has length 94 [2022-11-20 10:37:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:59,698 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 264 transitions. [2022-11-20 10:37:59,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:37:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 264 transitions. [2022-11-20 10:37:59,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:37:59,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:59,707 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, 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] [2022-11-20 10:37:59,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:37:59,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:37:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:59,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1071269142, now seen corresponding path program 1 times [2022-11-20 10:37:59,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:37:59,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547112510] [2022-11-20 10:37:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:37:59,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:37:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:00,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:00,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-20 10:38:00,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:00,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547112510] [2022-11-20 10:38:00,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547112510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:00,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:00,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:38:00,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418771336] [2022-11-20 10:38:00,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:00,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:38:00,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:00,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:38:00,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:00,227 INFO L87 Difference]: Start difference. First operand 152 states and 264 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:01,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:01,252 INFO L93 Difference]: Finished difference Result 553 states and 983 transitions. [2022-11-20 10:38:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:38:01,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:01,260 INFO L225 Difference]: With dead ends: 553 [2022-11-20 10:38:01,260 INFO L226 Difference]: Without dead ends: 404 [2022-11-20 10:38:01,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:38:01,265 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 477 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:01,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 762 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 10:38:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-20 10:38:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 182. [2022-11-20 10:38:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.7853107344632768) internal successors, (316), 178 states have internal predecessors, (316), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:38:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 322 transitions. [2022-11-20 10:38:01,295 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 322 transitions. Word has length 188 [2022-11-20 10:38:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:01,296 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 322 transitions. [2022-11-20 10:38:01,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:01,297 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 322 transitions. [2022-11-20 10:38:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:01,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:01,304 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, 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] [2022-11-20 10:38:01,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:38:01,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:01,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1036829934, now seen corresponding path program 1 times [2022-11-20 10:38:01,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:01,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618323950] [2022-11-20 10:38:01,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:01,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:01,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:01,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-20 10:38:01,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:01,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618323950] [2022-11-20 10:38:01,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618323950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:01,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:01,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:38:01,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382870048] [2022-11-20 10:38:01,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:01,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:38:01,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:01,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:38:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:01,672 INFO L87 Difference]: Start difference. First operand 182 states and 322 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:02,640 INFO L93 Difference]: Finished difference Result 671 states and 1209 transitions. [2022-11-20 10:38:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:38:02,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:02,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:02,646 INFO L225 Difference]: With dead ends: 671 [2022-11-20 10:38:02,647 INFO L226 Difference]: Without dead ends: 492 [2022-11-20 10:38:02,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:38:02,657 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 477 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:02,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 759 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 10:38:02,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-20 10:38:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 226. [2022-11-20 10:38:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.8099547511312217) internal successors, (400), 222 states have internal predecessors, (400), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:38:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 406 transitions. [2022-11-20 10:38:02,697 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 406 transitions. Word has length 188 [2022-11-20 10:38:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:02,697 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 406 transitions. [2022-11-20 10:38:02,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 406 transitions. [2022-11-20 10:38:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:02,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:02,711 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, 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] [2022-11-20 10:38:02,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:38:02,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:02,713 INFO L85 PathProgramCache]: Analyzing trace with hash -59773682, now seen corresponding path program 1 times [2022-11-20 10:38:02,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:02,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475441968] [2022-11-20 10:38:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:02,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:02,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:03,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-20 10:38:03,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:03,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475441968] [2022-11-20 10:38:03,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475441968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:03,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:03,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:38:03,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769947135] [2022-11-20 10:38:03,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:03,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:38:03,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:03,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:38:03,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:03,071 INFO L87 Difference]: Start difference. First operand 226 states and 406 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:04,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:04,207 INFO L93 Difference]: Finished difference Result 1035 states and 1879 transitions. [2022-11-20 10:38:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:38:04,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:04,214 INFO L225 Difference]: With dead ends: 1035 [2022-11-20 10:38:04,214 INFO L226 Difference]: Without dead ends: 812 [2022-11-20 10:38:04,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:38:04,217 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 814 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:04,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 753 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 10:38:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-11-20 10:38:04,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 350. [2022-11-20 10:38:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.8318840579710145) internal successors, (632), 346 states have internal predecessors, (632), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:38:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 638 transitions. [2022-11-20 10:38:04,242 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 638 transitions. Word has length 188 [2022-11-20 10:38:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:04,243 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 638 transitions. [2022-11-20 10:38:04,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 638 transitions. [2022-11-20 10:38:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:04,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:04,246 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, 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] [2022-11-20 10:38:04,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:38:04,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:04,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2092644362, now seen corresponding path program 1 times [2022-11-20 10:38:04,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:04,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687517289] [2022-11-20 10:38:04,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:04,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:04,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:04,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-20 10:38:04,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:04,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687517289] [2022-11-20 10:38:04,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687517289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:04,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:04,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:38:04,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859574341] [2022-11-20 10:38:04,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:04,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:38:04,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:38:04,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:04,554 INFO L87 Difference]: Start difference. First operand 350 states and 638 transitions. Second operand has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:05,718 INFO L93 Difference]: Finished difference Result 1267 states and 2337 transitions. [2022-11-20 10:38:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:38:05,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:05,726 INFO L225 Difference]: With dead ends: 1267 [2022-11-20 10:38:05,727 INFO L226 Difference]: Without dead ends: 920 [2022-11-20 10:38:05,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:38:05,732 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 842 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:05,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 543 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 10:38:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-11-20 10:38:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 440. [2022-11-20 10:38:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6735632183908047) internal successors, (728), 436 states have internal predecessors, (728), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:38:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 734 transitions. [2022-11-20 10:38:05,761 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 734 transitions. Word has length 188 [2022-11-20 10:38:05,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:05,762 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 734 transitions. [2022-11-20 10:38:05,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 734 transitions. [2022-11-20 10:38:05,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:05,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:05,767 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, 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] [2022-11-20 10:38:05,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:38:05,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:05,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1371492218, now seen corresponding path program 1 times [2022-11-20 10:38:05,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:05,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863951211] [2022-11-20 10:38:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:05,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:05,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:06,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:38:06,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:06,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863951211] [2022-11-20 10:38:06,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863951211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:06,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527957292] [2022-11-20 10:38:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:06,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:06,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:06,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:06,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:38:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:06,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:38:06,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-20 10:38:06,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:06,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527957292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:06,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:38:06,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 10:38:06,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036952297] [2022-11-20 10:38:06,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:06,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:06,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:06,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:06,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:06,406 INFO L87 Difference]: Start difference. First operand 440 states and 734 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:06,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:06,429 INFO L93 Difference]: Finished difference Result 877 states and 1467 transitions. [2022-11-20 10:38:06,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:06,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:06,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:06,433 INFO L225 Difference]: With dead ends: 877 [2022-11-20 10:38:06,433 INFO L226 Difference]: Without dead ends: 440 [2022-11-20 10:38:06,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:06,437 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:06,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 262 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:06,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-20 10:38:06,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-11-20 10:38:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6689655172413793) internal successors, (726), 436 states have internal predecessors, (726), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:38:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 732 transitions. [2022-11-20 10:38:06,459 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 732 transitions. Word has length 188 [2022-11-20 10:38:06,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:06,459 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 732 transitions. [2022-11-20 10:38:06,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:06,460 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 732 transitions. [2022-11-20 10:38:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:06,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:06,464 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, 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] [2022-11-20 10:38:06,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:06,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:06,672 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash 412512002, now seen corresponding path program 1 times [2022-11-20 10:38:06,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:06,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089983631] [2022-11-20 10:38:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:06,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:06,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:06,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:38:07,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:07,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089983631] [2022-11-20 10:38:07,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089983631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:07,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459823017] [2022-11-20 10:38:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:07,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:07,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:07,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:07,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:38:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:07,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:38:07,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-20 10:38:07,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:07,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459823017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:07,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:38:07,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 10:38:07,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196439795] [2022-11-20 10:38:07,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:07,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:07,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:07,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:07,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:07,351 INFO L87 Difference]: Start difference. First operand 440 states and 732 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:07,376 INFO L93 Difference]: Finished difference Result 877 states and 1463 transitions. [2022-11-20 10:38:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:07,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:07,382 INFO L225 Difference]: With dead ends: 877 [2022-11-20 10:38:07,382 INFO L226 Difference]: Without dead ends: 440 [2022-11-20 10:38:07,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:07,386 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:07,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 261 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-20 10:38:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-11-20 10:38:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.664367816091954) internal successors, (724), 436 states have internal predecessors, (724), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:38:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 730 transitions. [2022-11-20 10:38:07,413 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 730 transitions. Word has length 188 [2022-11-20 10:38:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:07,415 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 730 transitions. [2022-11-20 10:38:07,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 730 transitions. [2022-11-20 10:38:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:07,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:07,420 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, 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] [2022-11-20 10:38:07,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:07,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:07,635 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:07,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:07,636 INFO L85 PathProgramCache]: Analyzing trace with hash -117932026, now seen corresponding path program 1 times [2022-11-20 10:38:07,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:07,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338836545] [2022-11-20 10:38:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:07,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:07,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:07,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:38:07,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:07,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338836545] [2022-11-20 10:38:07,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338836545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:07,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715741339] [2022-11-20 10:38:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:07,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:07,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:07,987 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:07,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:38:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:08,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:38:08,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-20 10:38:08,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:08,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715741339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:08,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:38:08,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 10:38:08,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124019423] [2022-11-20 10:38:08,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:08,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:08,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:08,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:08,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:08,281 INFO L87 Difference]: Start difference. First operand 440 states and 730 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:08,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:08,306 INFO L93 Difference]: Finished difference Result 877 states and 1459 transitions. [2022-11-20 10:38:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:08,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:08,310 INFO L225 Difference]: With dead ends: 877 [2022-11-20 10:38:08,310 INFO L226 Difference]: Without dead ends: 440 [2022-11-20 10:38:08,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:08,317 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:08,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 260 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:08,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-20 10:38:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-11-20 10:38:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6597701149425288) internal successors, (722), 436 states have internal predecessors, (722), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:38:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 728 transitions. [2022-11-20 10:38:08,339 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 728 transitions. Word has length 188 [2022-11-20 10:38:08,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:08,340 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 728 transitions. [2022-11-20 10:38:08,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:08,340 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 728 transitions. [2022-11-20 10:38:08,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:08,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:08,344 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, 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] [2022-11-20 10:38:08,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:08,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:38:08,552 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:08,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:08,553 INFO L85 PathProgramCache]: Analyzing trace with hash 618172290, now seen corresponding path program 1 times [2022-11-20 10:38:08,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:08,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129710414] [2022-11-20 10:38:08,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:08,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:08,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:08,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:38:08,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129710414] [2022-11-20 10:38:08,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129710414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008604950] [2022-11-20 10:38:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:08,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:08,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:08,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:08,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:38:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:09,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:38:09,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 10:38:09,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:09,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008604950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:09,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:38:09,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 10:38:09,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584581482] [2022-11-20 10:38:09,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:09,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:09,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:09,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:09,142 INFO L87 Difference]: Start difference. First operand 440 states and 728 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:09,165 INFO L93 Difference]: Finished difference Result 877 states and 1455 transitions. [2022-11-20 10:38:09,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:09,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:09,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:09,168 INFO L225 Difference]: With dead ends: 877 [2022-11-20 10:38:09,169 INFO L226 Difference]: Without dead ends: 440 [2022-11-20 10:38:09,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:09,172 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:09,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 259 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-20 10:38:09,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-11-20 10:38:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.6551724137931034) internal successors, (720), 436 states have internal predecessors, (720), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:38:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 726 transitions. [2022-11-20 10:38:09,192 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 726 transitions. Word has length 188 [2022-11-20 10:38:09,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:09,213 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 726 transitions. [2022-11-20 10:38:09,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:09,214 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 726 transitions. [2022-11-20 10:38:09,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:09,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:09,219 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, 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] [2022-11-20 10:38:09,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 10:38:09,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:09,426 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:09,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:09,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1962569606, now seen corresponding path program 1 times [2022-11-20 10:38:09,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:09,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626715917] [2022-11-20 10:38:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:09,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:09,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:09,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 10:38:09,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:09,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626715917] [2022-11-20 10:38:09,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626715917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:09,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270601790] [2022-11-20 10:38:09,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:09,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:09,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:09,792 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:09,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:38:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:10,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:38:10,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 10:38:10,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:10,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270601790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:10,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:38:10,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-11-20 10:38:10,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433723563] [2022-11-20 10:38:10,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:10,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:10,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:10,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:10,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:10,075 INFO L87 Difference]: Start difference. First operand 440 states and 726 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:10,129 INFO L93 Difference]: Finished difference Result 1314 states and 2180 transitions. [2022-11-20 10:38:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:10,138 INFO L225 Difference]: With dead ends: 1314 [2022-11-20 10:38:10,138 INFO L226 Difference]: Without dead ends: 877 [2022-11-20 10:38:10,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:10,143 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:10,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:10,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-11-20 10:38:10,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 875. [2022-11-20 10:38:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 867 states have (on average 1.6262975778546713) internal successors, (1410), 868 states have internal predecessors, (1410), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 10:38:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1425 transitions. [2022-11-20 10:38:10,205 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1425 transitions. Word has length 188 [2022-11-20 10:38:10,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:10,206 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 1425 transitions. [2022-11-20 10:38:10,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1425 transitions. [2022-11-20 10:38:10,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:10,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:10,213 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, 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] [2022-11-20 10:38:10,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:10,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:10,421 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:10,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash -235127422, now seen corresponding path program 1 times [2022-11-20 10:38:10,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:10,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115168338] [2022-11-20 10:38:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:10,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:10,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:10,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 10:38:10,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:10,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115168338] [2022-11-20 10:38:10,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115168338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:10,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570337227] [2022-11-20 10:38:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:10,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:10,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:10,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:10,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:38:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:38:10,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 10:38:11,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:11,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570337227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:11,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:38:11,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-11-20 10:38:11,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812941971] [2022-11-20 10:38:11,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:11,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:11,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:11,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:11,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:11,042 INFO L87 Difference]: Start difference. First operand 875 states and 1425 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:11,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:11,133 INFO L93 Difference]: Finished difference Result 2401 states and 3973 transitions. [2022-11-20 10:38:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:11,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:11,147 INFO L225 Difference]: With dead ends: 2401 [2022-11-20 10:38:11,147 INFO L226 Difference]: Without dead ends: 1529 [2022-11-20 10:38:11,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:11,159 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:11,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2022-11-20 10:38:11,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2022-11-20 10:38:11,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1513 states have (on average 1.6252478519497686) internal successors, (2459), 1514 states have internal predecessors, (2459), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (36), 8 states have call predecessors, (36), 9 states have call successors, (36) [2022-11-20 10:38:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2504 transitions. [2022-11-20 10:38:11,254 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2504 transitions. Word has length 188 [2022-11-20 10:38:11,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:11,255 INFO L495 AbstractCegarLoop]: Abstraction has 1527 states and 2504 transitions. [2022-11-20 10:38:11,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2504 transitions. [2022-11-20 10:38:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:11,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:11,269 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, 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] [2022-11-20 10:38:11,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:11,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 10:38:11,477 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:11,478 INFO L85 PathProgramCache]: Analyzing trace with hash -415896190, now seen corresponding path program 1 times [2022-11-20 10:38:11,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:11,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497941356] [2022-11-20 10:38:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:11,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:11,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:11,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 10:38:11,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:11,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497941356] [2022-11-20 10:38:11,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497941356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:11,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133383432] [2022-11-20 10:38:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:11,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:11,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:11,827 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:11,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:38:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:12,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:38:12,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 10:38:12,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:12,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133383432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:12,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:38:12,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-11-20 10:38:12,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609412488] [2022-11-20 10:38:12,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:12,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:12,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:12,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:12,115 INFO L87 Difference]: Start difference. First operand 1527 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:12,271 INFO L93 Difference]: Finished difference Result 4575 states and 7634 transitions. [2022-11-20 10:38:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:12,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:12,308 INFO L225 Difference]: With dead ends: 4575 [2022-11-20 10:38:12,309 INFO L226 Difference]: Without dead ends: 3051 [2022-11-20 10:38:12,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:12,347 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:12,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2022-11-20 10:38:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3049. [2022-11-20 10:38:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3049 states, 3023 states have (on average 1.6040357260999007) internal successors, (4849), 3024 states have internal predecessors, (4849), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (136), 16 states have call predecessors, (136), 17 states have call successors, (136) [2022-11-20 10:38:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3049 states to 3049 states and 5002 transitions. [2022-11-20 10:38:12,582 INFO L78 Accepts]: Start accepts. Automaton has 3049 states and 5002 transitions. Word has length 188 [2022-11-20 10:38:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:12,583 INFO L495 AbstractCegarLoop]: Abstraction has 3049 states and 5002 transitions. [2022-11-20 10:38:12,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3049 states and 5002 transitions. [2022-11-20 10:38:12,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:12,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:12,623 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, 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] [2022-11-20 10:38:12,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:12,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 10:38:12,830 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:12,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:12,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1945748094, now seen corresponding path program 1 times [2022-11-20 10:38:12,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:12,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002494583] [2022-11-20 10:38:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:12,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:13,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:13,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 10:38:13,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:13,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002494583] [2022-11-20 10:38:13,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002494583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:13,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709037720] [2022-11-20 10:38:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:13,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:13,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:13,143 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:13,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:38:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:13,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:38:13,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 10:38:13,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:13,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709037720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:13,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:38:13,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 10:38:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666151038] [2022-11-20 10:38:13,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:13,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:13,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:13,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:13,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:13,454 INFO L87 Difference]: Start difference. First operand 3049 states and 5002 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:13,832 INFO L93 Difference]: Finished difference Result 9141 states and 15512 transitions. [2022-11-20 10:38:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:13,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:13,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:13,939 INFO L225 Difference]: With dead ends: 9141 [2022-11-20 10:38:13,939 INFO L226 Difference]: Without dead ends: 6095 [2022-11-20 10:38:14,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:38:14,041 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 212 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:14,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2022-11-20 10:38:14,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 6093. [2022-11-20 10:38:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6093 states, 6043 states have (on average 1.582492139665729) internal successors, (9563), 6044 states have internal predecessors, (9563), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (528), 32 states have call predecessors, (528), 33 states have call successors, (528) [2022-11-20 10:38:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6093 states to 6093 states and 10124 transitions. [2022-11-20 10:38:14,509 INFO L78 Accepts]: Start accepts. Automaton has 6093 states and 10124 transitions. Word has length 188 [2022-11-20 10:38:14,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:14,510 INFO L495 AbstractCegarLoop]: Abstraction has 6093 states and 10124 transitions. [2022-11-20 10:38:14,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:14,510 INFO L276 IsEmpty]: Start isEmpty. Operand 6093 states and 10124 transitions. [2022-11-20 10:38:14,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:14,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:14,630 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, 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] [2022-11-20 10:38:14,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:14,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:38:14,837 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:14,838 INFO L85 PathProgramCache]: Analyzing trace with hash 307905662, now seen corresponding path program 1 times [2022-11-20 10:38:14,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:14,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822669520] [2022-11-20 10:38:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:14,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:15,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:15,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 10:38:15,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:15,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822669520] [2022-11-20 10:38:15,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822669520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:15,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304329499] [2022-11-20 10:38:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:15,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:15,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:15,238 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:15,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:38:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:15,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:38:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 10:38:15,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:15,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304329499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:15,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:38:15,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-11-20 10:38:15,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537664636] [2022-11-20 10:38:15,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:15,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:15,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:15,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:15,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:15,509 INFO L87 Difference]: Start difference. First operand 6093 states and 10124 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:16,641 INFO L93 Difference]: Finished difference Result 18273 states and 32414 transitions. [2022-11-20 10:38:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:16,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:16,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:17,027 INFO L225 Difference]: With dead ends: 18273 [2022-11-20 10:38:17,027 INFO L226 Difference]: Without dead ends: 12183 [2022-11-20 10:38:17,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:17,215 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:17,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12183 states. [2022-11-20 10:38:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12183 to 12181. [2022-11-20 10:38:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 12083 states have (on average 1.560787883803691) internal successors, (18859), 12084 states have internal predecessors, (18859), 65 states have call successors, (65), 32 states have call predecessors, (65), 32 states have return successors, (2080), 64 states have call predecessors, (2080), 65 states have call successors, (2080) [2022-11-20 10:38:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 21004 transitions. [2022-11-20 10:38:18,337 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 21004 transitions. Word has length 188 [2022-11-20 10:38:18,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:18,338 INFO L495 AbstractCegarLoop]: Abstraction has 12181 states and 21004 transitions. [2022-11-20 10:38:18,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 21004 transitions. [2022-11-20 10:38:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:18,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:18,951 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, 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] [2022-11-20 10:38:18,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:19,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 10:38:19,158 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:19,159 INFO L85 PathProgramCache]: Analyzing trace with hash -342727814, now seen corresponding path program 1 times [2022-11-20 10:38:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:19,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569203851] [2022-11-20 10:38:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:19,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:19,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:19,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 10:38:19,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:19,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569203851] [2022-11-20 10:38:19,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569203851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:19,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007602326] [2022-11-20 10:38:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:19,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:19,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:19,555 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:19,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:38:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:19,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:38:19,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 10:38:19,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:19,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007602326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:19,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:38:19,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-11-20 10:38:19,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717966001] [2022-11-20 10:38:19,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:19,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:19,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:19,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:19,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:19,818 INFO L87 Difference]: Start difference. First operand 12181 states and 21004 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:22,957 INFO L93 Difference]: Finished difference Result 36537 states and 71198 transitions. [2022-11-20 10:38:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:22,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:23,797 INFO L225 Difference]: With dead ends: 36537 [2022-11-20 10:38:23,797 INFO L226 Difference]: Without dead ends: 24359 [2022-11-20 10:38:24,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:24,536 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:24,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 509 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24359 states. [2022-11-20 10:38:26,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24359 to 24357. [2022-11-20 10:38:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24357 states, 24163 states have (on average 1.5390059181393039) internal successors, (37187), 24164 states have internal predecessors, (37187), 129 states have call successors, (129), 64 states have call predecessors, (129), 64 states have return successors, (8256), 128 states have call predecessors, (8256), 129 states have call successors, (8256) [2022-11-20 10:38:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24357 states to 24357 states and 45572 transitions. [2022-11-20 10:38:28,066 INFO L78 Accepts]: Start accepts. Automaton has 24357 states and 45572 transitions. Word has length 188 [2022-11-20 10:38:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:28,067 INFO L495 AbstractCegarLoop]: Abstraction has 24357 states and 45572 transitions. [2022-11-20 10:38:28,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 24357 states and 45572 transitions. [2022-11-20 10:38:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:38:29,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:29,456 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, 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] [2022-11-20 10:38:29,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:29,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:38:29,662 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1629754234, now seen corresponding path program 1 times [2022-11-20 10:38:29,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:29,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501827547] [2022-11-20 10:38:29,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:29,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:29,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:30,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-20 10:38:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 10:38:30,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:30,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501827547] [2022-11-20 10:38:30,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501827547] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:30,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14670847] [2022-11-20 10:38:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:30,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:30,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:30,301 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:30,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da380163-e744-4d9e-9423-0d6e26ce8d24/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:38:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:30,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:38:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 10:38:30,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:30,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14670847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:30,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:38:30,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-11-20 10:38:30,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226568367] [2022-11-20 10:38:30,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:30,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:30,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:30,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:30,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:30,533 INFO L87 Difference]: Start difference. First operand 24357 states and 45572 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:39,025 INFO L93 Difference]: Finished difference Result 73065 states and 169478 transitions. [2022-11-20 10:38:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:39,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-11-20 10:38:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:42,003 INFO L225 Difference]: With dead ends: 73065 [2022-11-20 10:38:42,003 INFO L226 Difference]: Without dead ends: 48711 [2022-11-20 10:38:44,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:44,576 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 227 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:44,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48711 states. [2022-11-20 10:38:50,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48711 to 48709. [2022-11-20 10:38:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48709 states, 48323 states have (on average 1.5171864329615297) internal successors, (73315), 48324 states have internal predecessors, (73315), 257 states have call successors, (257), 128 states have call predecessors, (257), 128 states have return successors, (32896), 256 states have call predecessors, (32896), 257 states have call successors, (32896) [2022-11-20 10:38:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48709 states to 48709 states and 106468 transitions. [2022-11-20 10:38:54,885 INFO L78 Accepts]: Start accepts. Automaton has 48709 states and 106468 transitions. Word has length 188 [2022-11-20 10:38:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:54,886 INFO L495 AbstractCegarLoop]: Abstraction has 48709 states and 106468 transitions. [2022-11-20 10:38:54,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:38:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 48709 states and 106468 transitions.