./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 07:57:39,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 07:57:39,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 07:57:39,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 07:57:39,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 07:57:39,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 07:57:39,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 07:57:39,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 07:57:39,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 07:57:39,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 07:57:39,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 07:57:39,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 07:57:39,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 07:57:39,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 07:57:39,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 07:57:39,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 07:57:39,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 07:57:39,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 07:57:39,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 07:57:39,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 07:57:39,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 07:57:39,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 07:57:39,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 07:57:39,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 07:57:39,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 07:57:39,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 07:57:39,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 07:57:39,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 07:57:39,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 07:57:39,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 07:57:39,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 07:57:39,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 07:57:39,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 07:57:39,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 07:57:39,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 07:57:39,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 07:57:39,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 07:57:39,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 07:57:39,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 07:57:39,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 07:57:39,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 07:57:39,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 07:57:39,181 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 07:57:39,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 07:57:39,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 07:57:39,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 07:57:39,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 07:57:39,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 07:57:39,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 07:57:39,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 07:57:39,185 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 07:57:39,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 07:57:39,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 07:57:39,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 07:57:39,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 07:57:39,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 07:57:39,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 07:57:39,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 07:57:39,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 07:57:39,187 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 07:57:39,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 07:57:39,187 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 07:57:39,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 07:57:39,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 07:57:39,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 07:57:39,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 07:57:39,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 07:57:39,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 07:57:39,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 07:57:39,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 07:57:39,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 07:57:39,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 07:57:39,189 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 07:57:39,189 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 07:57:39,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 07:57:39,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 07:57:39,190 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 [2021-12-22 07:57:39,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 07:57:39,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 07:57:39,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 07:57:39,419 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 07:57:39,419 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 07:57:39,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2021-12-22 07:57:39,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b369dd99b/6e42a31a7ffb494e89b77751b8810167/FLAG629c19ab0 [2021-12-22 07:57:39,812 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 07:57:39,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2021-12-22 07:57:39,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b369dd99b/6e42a31a7ffb494e89b77751b8810167/FLAG629c19ab0 [2021-12-22 07:57:39,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b369dd99b/6e42a31a7ffb494e89b77751b8810167 [2021-12-22 07:57:39,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 07:57:39,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 07:57:39,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 07:57:39,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 07:57:39,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 07:57:39,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:57:39" (1/1) ... [2021-12-22 07:57:39,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72cf5b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:39, skipping insertion in model container [2021-12-22 07:57:39,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:57:39" (1/1) ... [2021-12-22 07:57:39,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 07:57:39,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 07:57:39,974 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2021-12-22 07:57:39,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 07:57:40,000 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 07:57:40,016 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2021-12-22 07:57:40,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 07:57:40,051 INFO L208 MainTranslator]: Completed translation [2021-12-22 07:57:40,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40 WrapperNode [2021-12-22 07:57:40,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 07:57:40,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 07:57:40,052 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 07:57:40,052 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 07:57:40,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,089 INFO L137 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 137 [2021-12-22 07:57:40,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 07:57:40,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 07:57:40,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 07:57:40,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 07:57:40,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 07:57:40,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 07:57:40,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 07:57:40,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 07:57:40,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 07:57:40,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:40,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 07:57:40,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 07:57:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 07:57:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 07:57:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 07:57:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 07:57:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 07:57:40,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 07:57:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 07:57:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 07:57:40,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 07:57:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 07:57:40,251 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 07:57:40,253 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 07:57:40,376 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 07:57:40,380 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 07:57:40,388 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-22 07:57:40,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:57:40 BoogieIcfgContainer [2021-12-22 07:57:40,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 07:57:40,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 07:57:40,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 07:57:40,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 07:57:40,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:57:39" (1/3) ... [2021-12-22 07:57:40,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc03e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:57:40, skipping insertion in model container [2021-12-22 07:57:40,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (2/3) ... [2021-12-22 07:57:40,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc03e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:57:40, skipping insertion in model container [2021-12-22 07:57:40,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:57:40" (3/3) ... [2021-12-22 07:57:40,396 INFO L111 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2021-12-22 07:57:40,414 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 07:57:40,414 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 07:57:40,448 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 07:57:40,453 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 07:57:40,454 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 07:57:40,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 07:57:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 07:57:40,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:40,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:40,469 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:40,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1976888394, now seen corresponding path program 1 times [2021-12-22 07:57:40,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:40,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360943492] [2021-12-22 07:57:40,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:40,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 07:57:40,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:40,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360943492] [2021-12-22 07:57:40,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360943492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 07:57:40,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 07:57:40,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 07:57:40,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461182342] [2021-12-22 07:57:40,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 07:57:40,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 07:57:40,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:40,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 07:57:40,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 07:57:40,640 INFO L87 Difference]: Start difference. First operand has 41 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:40,696 INFO L93 Difference]: Finished difference Result 110 states and 169 transitions. [2021-12-22 07:57:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 07:57:40,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 07:57:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:40,703 INFO L225 Difference]: With dead ends: 110 [2021-12-22 07:57:40,703 INFO L226 Difference]: Without dead ends: 65 [2021-12-22 07:57:40,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 07:57:40,707 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:40,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 82 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 07:57:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-22 07:57:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-12-22 07:57:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 07:57:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-12-22 07:57:40,733 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 10 [2021-12-22 07:57:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:40,733 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-12-22 07:57:40,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-12-22 07:57:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 07:57:40,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:40,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:40,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 07:57:40,735 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:40,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1321690828, now seen corresponding path program 1 times [2021-12-22 07:57:40,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:40,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653757679] [2021-12-22 07:57:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:40,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 07:57:40,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:40,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653757679] [2021-12-22 07:57:40,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653757679] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:40,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630141815] [2021-12-22 07:57:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:40,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:40,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:40,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:40,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 07:57:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:40,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 07:57:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 07:57:40,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:57:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 07:57:40,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630141815] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:57:40,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:57:40,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-22 07:57:40,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785084459] [2021-12-22 07:57:40,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:57:40,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 07:57:40,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 07:57:40,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 07:57:40,901 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:41,022 INFO L93 Difference]: Finished difference Result 181 states and 243 transitions. [2021-12-22 07:57:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 07:57:41,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-22 07:57:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:41,025 INFO L225 Difference]: With dead ends: 181 [2021-12-22 07:57:41,025 INFO L226 Difference]: Without dead ends: 148 [2021-12-22 07:57:41,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 07:57:41,027 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 147 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:41,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 202 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 07:57:41,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-22 07:57:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 44. [2021-12-22 07:57:41,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 07:57:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-12-22 07:57:41,035 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 12 [2021-12-22 07:57:41,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:41,036 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-12-22 07:57:41,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,036 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-12-22 07:57:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 07:57:41,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:41,037 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:41,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:41,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:41,254 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:41,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:41,255 INFO L85 PathProgramCache]: Analyzing trace with hash -202652846, now seen corresponding path program 2 times [2021-12-22 07:57:41,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:41,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130231891] [2021-12-22 07:57:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:41,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 07:57:41,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:41,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130231891] [2021-12-22 07:57:41,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130231891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 07:57:41,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 07:57:41,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 07:57:41,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911114567] [2021-12-22 07:57:41,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 07:57:41,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 07:57:41,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:41,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 07:57:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 07:57:41,323 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:41,351 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2021-12-22 07:57:41,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 07:57:41,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-22 07:57:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:41,353 INFO L225 Difference]: With dead ends: 82 [2021-12-22 07:57:41,353 INFO L226 Difference]: Without dead ends: 48 [2021-12-22 07:57:41,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 07:57:41,354 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:41,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 56 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 07:57:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-22 07:57:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-22 07:57:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 07:57:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-12-22 07:57:41,359 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 18 [2021-12-22 07:57:41,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:41,359 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-12-22 07:57:41,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,360 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-12-22 07:57:41,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 07:57:41,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:41,361 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:41,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 07:57:41,361 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:41,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1069304186, now seen corresponding path program 1 times [2021-12-22 07:57:41,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:41,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493406067] [2021-12-22 07:57:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:41,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 07:57:41,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:41,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493406067] [2021-12-22 07:57:41,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493406067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 07:57:41,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 07:57:41,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 07:57:41,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149131215] [2021-12-22 07:57:41,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 07:57:41,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 07:57:41,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:41,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 07:57:41,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 07:57:41,452 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:41,473 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2021-12-22 07:57:41,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 07:57:41,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-22 07:57:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:41,475 INFO L225 Difference]: With dead ends: 90 [2021-12-22 07:57:41,477 INFO L226 Difference]: Without dead ends: 59 [2021-12-22 07:57:41,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 07:57:41,478 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:41,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 63 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 07:57:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-22 07:57:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2021-12-22 07:57:41,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 07:57:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-12-22 07:57:41,489 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 31 [2021-12-22 07:57:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:41,490 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-12-22 07:57:41,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-12-22 07:57:41,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 07:57:41,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:41,492 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:41,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 07:57:41,492 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:41,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1327947132, now seen corresponding path program 1 times [2021-12-22 07:57:41,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:41,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68840054] [2021-12-22 07:57:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:41,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 07:57:41,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:41,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68840054] [2021-12-22 07:57:41,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68840054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:41,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444699327] [2021-12-22 07:57:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:41,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:41,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:41,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:41,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 07:57:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:41,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 07:57:41,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 07:57:41,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:57:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 07:57:41,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444699327] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:57:41,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:57:41,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-22 07:57:41,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288071889] [2021-12-22 07:57:41,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:57:41,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 07:57:41,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:41,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 07:57:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-22 07:57:41,798 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:41,924 INFO L93 Difference]: Finished difference Result 187 states and 243 transitions. [2021-12-22 07:57:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 07:57:41,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-22 07:57:41,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:41,926 INFO L225 Difference]: With dead ends: 187 [2021-12-22 07:57:41,926 INFO L226 Difference]: Without dead ends: 150 [2021-12-22 07:57:41,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-12-22 07:57:41,927 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 173 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:41,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 176 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 07:57:41,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-22 07:57:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 72. [2021-12-22 07:57:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 07:57:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-12-22 07:57:41,947 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 33 [2021-12-22 07:57:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:41,947 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-12-22 07:57:41,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-12-22 07:57:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 07:57:41,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:41,951 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:41,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:42,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:42,167 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:42,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:42,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1439765920, now seen corresponding path program 1 times [2021-12-22 07:57:42,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:42,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071170023] [2021-12-22 07:57:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:42,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-22 07:57:42,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:42,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071170023] [2021-12-22 07:57:42,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071170023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 07:57:42,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 07:57:42,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 07:57:42,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891957012] [2021-12-22 07:57:42,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 07:57:42,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 07:57:42,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:42,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 07:57:42,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 07:57:42,283 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:42,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:42,298 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2021-12-22 07:57:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 07:57:42,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-22 07:57:42,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:42,300 INFO L225 Difference]: With dead ends: 121 [2021-12-22 07:57:42,300 INFO L226 Difference]: Without dead ends: 91 [2021-12-22 07:57:42,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 07:57:42,301 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 11 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:42,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 132 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 07:57:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-22 07:57:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2021-12-22 07:57:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 72 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 07:57:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2021-12-22 07:57:42,306 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 53 [2021-12-22 07:57:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:42,306 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2021-12-22 07:57:42,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:42,307 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2021-12-22 07:57:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 07:57:42,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:42,307 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:42,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 07:57:42,308 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:42,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:42,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1235733610, now seen corresponding path program 1 times [2021-12-22 07:57:42,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:42,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929900267] [2021-12-22 07:57:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:42,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 07:57:42,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:42,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929900267] [2021-12-22 07:57:42,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929900267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:42,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493831103] [2021-12-22 07:57:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:42,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:42,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:42,418 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:42,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 07:57:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:42,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 07:57:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 07:57:42,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:57:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 07:57:42,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493831103] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:57:42,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:57:42,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-22 07:57:42,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684727225] [2021-12-22 07:57:42,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:57:42,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 07:57:42,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 07:57:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 07:57:42,777 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:42,968 INFO L93 Difference]: Finished difference Result 283 states and 364 transitions. [2021-12-22 07:57:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 07:57:42,968 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-22 07:57:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:42,969 INFO L225 Difference]: With dead ends: 283 [2021-12-22 07:57:42,969 INFO L226 Difference]: Without dead ends: 231 [2021-12-22 07:57:42,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 07:57:42,970 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 306 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:42,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 170 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 07:57:42,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-22 07:57:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 99. [2021-12-22 07:57:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 96 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 07:57:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2021-12-22 07:57:42,978 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 53 [2021-12-22 07:57:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:42,978 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2021-12-22 07:57:42,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2021-12-22 07:57:42,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 07:57:42,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:42,979 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:42,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:43,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:43,200 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:43,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1201823662, now seen corresponding path program 2 times [2021-12-22 07:57:43,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:43,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776852177] [2021-12-22 07:57:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:43,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 07:57:43,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:43,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776852177] [2021-12-22 07:57:43,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776852177] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:43,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946856939] [2021-12-22 07:57:43,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 07:57:43,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:43,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:43,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:43,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 07:57:43,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 07:57:43,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 07:57:43,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 07:57:43,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 07:57:43,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:57:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 07:57:44,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946856939] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:57:44,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:57:44,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-22 07:57:44,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115803854] [2021-12-22 07:57:44,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:57:44,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-22 07:57:44,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-22 07:57:44,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 07:57:44,322 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand has 49 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:44,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:44,785 INFO L93 Difference]: Finished difference Result 475 states and 616 transitions. [2021-12-22 07:57:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 07:57:44,786 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-22 07:57:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:44,787 INFO L225 Difference]: With dead ends: 475 [2021-12-22 07:57:44,787 INFO L226 Difference]: Without dead ends: 423 [2021-12-22 07:57:44,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 07:57:44,789 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 632 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:44,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 342 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 07:57:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-12-22 07:57:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 147. [2021-12-22 07:57:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 144 states have (on average 1.0972222222222223) internal successors, (158), 144 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 07:57:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 160 transitions. [2021-12-22 07:57:44,800 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 160 transitions. Word has length 77 [2021-12-22 07:57:44,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:44,800 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 160 transitions. [2021-12-22 07:57:44,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 160 transitions. [2021-12-22 07:57:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-22 07:57:44,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:44,802 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:44,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:45,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:45,015 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2102943710, now seen corresponding path program 3 times [2021-12-22 07:57:45,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:45,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043112703] [2021-12-22 07:57:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:45,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 07:57:45,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043112703] [2021-12-22 07:57:45,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043112703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939901949] [2021-12-22 07:57:45,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 07:57:45,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:45,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:45,824 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:45,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 07:57:45,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-22 07:57:45,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 07:57:45,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 07:57:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2123 trivial. 0 not checked. [2021-12-22 07:57:46,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:57:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2123 trivial. 0 not checked. [2021-12-22 07:57:46,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939901949] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:57:46,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:57:46,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 5, 5] total 55 [2021-12-22 07:57:46,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285954475] [2021-12-22 07:57:46,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:57:46,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-22 07:57:46,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:46,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-22 07:57:46,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=1767, Unknown=0, NotChecked=0, Total=2970 [2021-12-22 07:57:46,267 INFO L87 Difference]: Start difference. First operand 147 states and 160 transitions. Second operand has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:46,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:46,855 INFO L93 Difference]: Finished difference Result 566 states and 718 transitions. [2021-12-22 07:57:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-22 07:57:46,856 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-22 07:57:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:46,859 INFO L225 Difference]: With dead ends: 566 [2021-12-22 07:57:46,859 INFO L226 Difference]: Without dead ends: 514 [2021-12-22 07:57:46,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1533, Invalid=2127, Unknown=0, NotChecked=0, Total=3660 [2021-12-22 07:57:46,863 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1096 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:46,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 457 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 07:57:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-12-22 07:57:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 229. [2021-12-22 07:57:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 226 states have (on average 1.168141592920354) internal successors, (264), 226 states have internal predecessors, (264), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 07:57:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 266 transitions. [2021-12-22 07:57:46,879 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 266 transitions. Word has length 125 [2021-12-22 07:57:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:46,880 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 266 transitions. [2021-12-22 07:57:46,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 266 transitions. [2021-12-22 07:57:46,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-22 07:57:46,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:46,888 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:46,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:47,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:47,101 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:47,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1761277144, now seen corresponding path program 4 times [2021-12-22 07:57:47,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:47,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208839556] [2021-12-22 07:57:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:47,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2336 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-22 07:57:47,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:47,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208839556] [2021-12-22 07:57:47,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208839556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:47,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467360220] [2021-12-22 07:57:47,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 07:57:47,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:47,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:47,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:47,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 07:57:48,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 07:57:48,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 07:57:48,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-22 07:57:48,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2336 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-22 07:57:48,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:57:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2336 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-22 07:57:50,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467360220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:57:50,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:57:50,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2021-12-22 07:57:50,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241821844] [2021-12-22 07:57:50,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:57:50,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-22 07:57:50,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-22 07:57:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-12-22 07:57:50,515 INFO L87 Difference]: Start difference. First operand 229 states and 266 transitions. Second operand has 99 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:52,317 INFO L93 Difference]: Finished difference Result 1035 states and 1349 transitions. [2021-12-22 07:57:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-22 07:57:52,318 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-12-22 07:57:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:52,322 INFO L225 Difference]: With dead ends: 1035 [2021-12-22 07:57:52,322 INFO L226 Difference]: Without dead ends: 903 [2021-12-22 07:57:52,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-12-22 07:57:52,325 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 1652 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1748 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 676 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:52,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1748 Valid, 576 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [676 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 07:57:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-12-22 07:57:52,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 327. [2021-12-22 07:57:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 324 states have (on average 1.117283950617284) internal successors, (362), 324 states have internal predecessors, (362), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 07:57:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 364 transitions. [2021-12-22 07:57:52,351 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 364 transitions. Word has length 159 [2021-12-22 07:57:52,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:52,351 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 364 transitions. [2021-12-22 07:57:52,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:52,352 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 364 transitions. [2021-12-22 07:57:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-22 07:57:52,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:52,353 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:52,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:52,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:52,571 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:52,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:52,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1416641146, now seen corresponding path program 5 times [2021-12-22 07:57:52,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:52,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506912736] [2021-12-22 07:57:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:52,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9343 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-22 07:57:55,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:55,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506912736] [2021-12-22 07:57:55,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506912736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:55,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436818645] [2021-12-22 07:57:55,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 07:57:55,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:55,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:55,264 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:55,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process