./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 4ddd309ae0a111f327a334b2e2027868d59ca213 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-04 19:30:31,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-04 19:30:31,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-04 19:30:31,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-04 19:30:31,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-04 19:30:31,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-04 19:30:31,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-04 19:30:31,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-04 19:30:31,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-04 19:30:31,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-04 19:30:31,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-04 19:30:31,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-04 19:30:31,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-04 19:30:31,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-04 19:30:31,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-04 19:30:31,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-04 19:30:31,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-04 19:30:31,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-04 19:30:31,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-04 19:30:31,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-04 19:30:31,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-04 19:30:31,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-04 19:30:31,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-04 19:30:31,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-04 19:30:31,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-04 19:30:31,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-04 19:30:31,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-04 19:30:31,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-04 19:30:31,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-04 19:30:31,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-04 19:30:31,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-04 19:30:31,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-04 19:30:31,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-04 19:30:31,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-04 19:30:31,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-04 19:30:31,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-04 19:30:31,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-04 19:30:31,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-04 19:30:31,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-04 19:30:31,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-04 19:30:31,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-04 19:30:31,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-04 19:30:31,229 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-04 19:30:31,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-04 19:30:31,230 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-04 19:30:31,231 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-04 19:30:31,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-04 19:30:31,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-04 19:30:31,234 INFO L138 SettingsManager]: * Use SBE=true [2021-10-04 19:30:31,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-04 19:30:31,234 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-04 19:30:31,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-04 19:30:31,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-04 19:30:31,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-04 19:30:31,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-04 19:30:31,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-04 19:30:31,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-04 19:30:31,237 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-04 19:30:31,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-04 19:30:31,238 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-04 19:30:31,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-04 19:30:31,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-04 19:30:31,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-04 19:30:31,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-04 19:30:31,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 19:30:31,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-04 19:30:31,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-04 19:30:31,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-04 19:30:31,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-04 19:30:31,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-04 19:30:31,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-04 19:30:31,241 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-04 19:30:31,241 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ddd309ae0a111f327a334b2e2027868d59ca213 [2021-10-04 19:30:31,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-04 19:30:31,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-04 19:30:31,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-04 19:30:31,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-04 19:30:31,722 INFO L275 PluginConnector]: CDTParser initialized [2021-10-04 19:30:31,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c [2021-10-04 19:30:31,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f1c97668/77ad680b322342319811735ab88f0dee/FLAG85ef94be0 [2021-10-04 19:30:32,456 INFO L306 CDTParser]: Found 1 translation units. [2021-10-04 19:30:32,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c [2021-10-04 19:30:32,457 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 19:30:32,458 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 19:30:32,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f1c97668/77ad680b322342319811735ab88f0dee/FLAG85ef94be0 [2021-10-04 19:30:32,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f1c97668/77ad680b322342319811735ab88f0dee [2021-10-04 19:30:32,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-04 19:30:32,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-04 19:30:32,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-04 19:30:32,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-04 19:30:32,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-04 19:30:32,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 07:30:32" (1/1) ... [2021-10-04 19:30:32,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb0254f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:32, skipping insertion in model container [2021-10-04 19:30:32,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 07:30:32" (1/1) ... [2021-10-04 19:30:32,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-04 19:30:32,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-04 19:30:33,022 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 19:30:33,079 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c[1084,1097] [2021-10-04 19:30:33,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 19:30:33,092 INFO L203 MainTranslator]: Completed pre-run [2021-10-04 19:30:33,105 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 19:30:33,114 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c[1084,1097] [2021-10-04 19:30:33,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 19:30:33,131 INFO L208 MainTranslator]: Completed translation [2021-10-04 19:30:33,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:33 WrapperNode [2021-10-04 19:30:33,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-04 19:30:33,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-04 19:30:33,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-04 19:30:33,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-04 19:30:33,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:33" (1/1) ... [2021-10-04 19:30:33,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:33" (1/1) ... [2021-10-04 19:30:33,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-04 19:30:33,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-04 19:30:33,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-04 19:30:33,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-04 19:30:33,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:33" (1/1) ... [2021-10-04 19:30:33,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:33" (1/1) ... [2021-10-04 19:30:33,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:33" (1/1) ... [2021-10-04 19:30:33,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:33" (1/1) ... [2021-10-04 19:30:33,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:33" (1/1) ... [2021-10-04 19:30:33,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:33" (1/1) ... [2021-10-04 19:30:33,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:33" (1/1) ... [2021-10-04 19:30:33,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-04 19:30:33,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-04 19:30:33,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-04 19:30:33,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-04 19:30:33,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:33" (1/1) ... [2021-10-04 19:30:33,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 19:30:33,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:33,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-04 19:30:33,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-04 19:30:33,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-04 19:30:33,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-04 19:30:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-04 19:30:33,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-04 19:30:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-04 19:30:33,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-04 19:30:33,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-04 19:30:33,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-04 19:30:33,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-04 19:30:33,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-04 19:30:33,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-04 19:30:33,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-04 19:30:33,337 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-04 19:30:33,747 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-04 19:30:33,748 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-04 19:30:33,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 07:30:33 BoogieIcfgContainer [2021-10-04 19:30:33,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-04 19:30:33,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-04 19:30:33,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-04 19:30:33,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-04 19:30:33,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.10 07:30:32" (1/3) ... [2021-10-04 19:30:33,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58518b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 07:30:33, skipping insertion in model container [2021-10-04 19:30:33,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:30:33" (2/3) ... [2021-10-04 19:30:33,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58518b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 07:30:33, skipping insertion in model container [2021-10-04 19:30:33,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 07:30:33" (3/3) ... [2021-10-04 19:30:33,772 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.c [2021-10-04 19:30:33,791 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-04 19:30:33,791 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-04 19:30:33,792 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-04 19:30:33,792 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-04 19:30:33,865 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,866 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,866 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,866 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,868 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,868 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,872 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,872 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,872 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,873 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,876 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,876 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,876 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,877 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:30:33,885 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-04 19:30:33,939 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-04 19:30:33,947 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-04 19:30:33,947 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-04 19:30:33,963 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-04 19:30:33,980 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 71 transitions, 158 flow [2021-10-04 19:30:33,983 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 71 transitions, 158 flow [2021-10-04 19:30:33,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 71 places, 71 transitions, 158 flow [2021-10-04 19:30:34,034 INFO L129 PetriNetUnfolder]: 7/69 cut-off events. [2021-10-04 19:30:34,035 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-04 19:30:34,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 7/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 43. Up to 3 conditions per place. [2021-10-04 19:30:34,041 INFO L116 LiptonReduction]: Number of co-enabled transitions 282 [2021-10-04 19:30:36,142 INFO L131 LiptonReduction]: Checked pairs total: 546 [2021-10-04 19:30:36,143 INFO L133 LiptonReduction]: Total number of compositions: 64 [2021-10-04 19:30:36,153 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 19 transitions, 54 flow [2021-10-04 19:30:36,167 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-04 19:30:36,177 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:36,178 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:36,179 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:36,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:36,185 INFO L82 PathProgramCache]: Analyzing trace with hash -455104020, now seen corresponding path program 1 times [2021-10-04 19:30:36,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:36,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224646234] [2021-10-04 19:30:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:36,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:36,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:36,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224646234] [2021-10-04 19:30:36,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224646234] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:30:36,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:30:36,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-04 19:30:36,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461348512] [2021-10-04 19:30:36,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-04 19:30:36,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:36,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-04 19:30:36,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 19:30:36,455 INFO L87 Difference]: Start difference. First operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:36,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:36,494 INFO L93 Difference]: Finished difference Result 40 states and 95 transitions. [2021-10-04 19:30:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-04 19:30:36,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-04 19:30:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:36,508 INFO L225 Difference]: With dead ends: 40 [2021-10-04 19:30:36,508 INFO L226 Difference]: Without dead ends: 36 [2021-10-04 19:30:36,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 19:30:36,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-04 19:30:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-04 19:30:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 85 transitions. [2021-10-04 19:30:36,551 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 85 transitions. Word has length 11 [2021-10-04 19:30:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:36,552 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 85 transitions. [2021-10-04 19:30:36,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 85 transitions. [2021-10-04 19:30:36,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-04 19:30:36,554 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:36,554 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:36,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-04 19:30:36,555 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:36,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1615301067, now seen corresponding path program 1 times [2021-10-04 19:30:36,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:36,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543972811] [2021-10-04 19:30:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:36,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:36,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:36,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543972811] [2021-10-04 19:30:36,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543972811] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:30:36,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:30:36,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-04 19:30:36,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143658437] [2021-10-04 19:30:36,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:30:36,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:36,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:30:36,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:30:36,635 INFO L87 Difference]: Start difference. First operand 36 states and 85 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:36,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:36,667 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2021-10-04 19:30:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:30:36,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-04 19:30:36,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:36,670 INFO L225 Difference]: With dead ends: 68 [2021-10-04 19:30:36,670 INFO L226 Difference]: Without dead ends: 68 [2021-10-04 19:30:36,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:30:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-04 19:30:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-10-04 19:30:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4615384615384617) internal successors, (160), 65 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 160 transitions. [2021-10-04 19:30:36,689 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 160 transitions. Word has length 13 [2021-10-04 19:30:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:36,690 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 160 transitions. [2021-10-04 19:30:36,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 160 transitions. [2021-10-04 19:30:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 19:30:36,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:36,693 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:36,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-04 19:30:36,695 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:36,701 INFO L82 PathProgramCache]: Analyzing trace with hash -274069497, now seen corresponding path program 1 times [2021-10-04 19:30:36,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:36,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687036976] [2021-10-04 19:30:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:36,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:36,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:36,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687036976] [2021-10-04 19:30:36,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687036976] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:30:36,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:30:36,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-04 19:30:36,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368194427] [2021-10-04 19:30:36,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:30:36,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:30:36,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:30:36,819 INFO L87 Difference]: Start difference. First operand 66 states and 160 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:36,849 INFO L93 Difference]: Finished difference Result 88 states and 206 transitions. [2021-10-04 19:30:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:30:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-04 19:30:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:36,852 INFO L225 Difference]: With dead ends: 88 [2021-10-04 19:30:36,853 INFO L226 Difference]: Without dead ends: 88 [2021-10-04 19:30:36,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:30:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-04 19:30:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-10-04 19:30:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.4927536231884058) internal successors, (172), 69 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2021-10-04 19:30:36,868 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 15 [2021-10-04 19:30:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:36,869 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2021-10-04 19:30:36,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2021-10-04 19:30:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 19:30:36,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:36,871 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:36,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-04 19:30:36,872 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1909040155, now seen corresponding path program 2 times [2021-10-04 19:30:36,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:36,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6679610] [2021-10-04 19:30:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:36,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:37,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:37,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6679610] [2021-10-04 19:30:37,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6679610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:37,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994603406] [2021-10-04 19:30:37,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:30:37,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:37,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:37,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:37,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-04 19:30:37,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:30:37,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:37,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-04 19:30:37,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:37,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994603406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:37,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:37,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2021-10-04 19:30:37,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002566427] [2021-10-04 19:30:37,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-04 19:30:37,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:37,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-04 19:30:37,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-10-04 19:30:37,913 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:38,376 INFO L93 Difference]: Finished difference Result 108 states and 242 transitions. [2021-10-04 19:30:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-04 19:30:38,376 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 19:30:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:38,379 INFO L225 Difference]: With dead ends: 108 [2021-10-04 19:30:38,379 INFO L226 Difference]: Without dead ends: 82 [2021-10-04 19:30:38,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 500.4ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-10-04 19:30:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-04 19:30:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2021-10-04 19:30:38,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.4935064935064934) internal successors, (192), 77 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2021-10-04 19:30:38,408 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 17 [2021-10-04 19:30:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:38,408 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2021-10-04 19:30:38,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2021-10-04 19:30:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 19:30:38,411 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:38,411 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:38,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:38,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:38,625 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:38,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:38,627 INFO L82 PathProgramCache]: Analyzing trace with hash -322709493, now seen corresponding path program 3 times [2021-10-04 19:30:38,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:38,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901937040] [2021-10-04 19:30:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:38,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:38,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:38,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901937040] [2021-10-04 19:30:38,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901937040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:38,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847092965] [2021-10-04 19:30:38,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:30:38,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:38,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:38,850 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:38,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-04 19:30:38,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 19:30:38,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:38,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-04 19:30:38,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:39,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847092965] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:39,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:39,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2021-10-04 19:30:39,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136143964] [2021-10-04 19:30:39,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-04 19:30:39,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-04 19:30:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-10-04 19:30:39,410 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:39,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:39,853 INFO L93 Difference]: Finished difference Result 146 states and 338 transitions. [2021-10-04 19:30:39,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 19:30:39,854 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 19:30:39,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:39,855 INFO L225 Difference]: With dead ends: 146 [2021-10-04 19:30:39,855 INFO L226 Difference]: Without dead ends: 122 [2021-10-04 19:30:39,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-10-04 19:30:39,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-04 19:30:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2021-10-04 19:30:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.5054945054945055) internal successors, (228), 91 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 228 transitions. [2021-10-04 19:30:39,866 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 228 transitions. Word has length 17 [2021-10-04 19:30:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:39,867 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 228 transitions. [2021-10-04 19:30:39,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 228 transitions. [2021-10-04 19:30:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 19:30:39,869 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:39,869 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:39,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:40,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:40,085 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:40,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:40,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1013299205, now seen corresponding path program 4 times [2021-10-04 19:30:40,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:40,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88359845] [2021-10-04 19:30:40,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:40,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:40,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:40,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88359845] [2021-10-04 19:30:40,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88359845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:40,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642078011] [2021-10-04 19:30:40,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:30:40,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:40,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:40,278 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:40,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-04 19:30:40,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:30:40,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:40,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 19:30:40,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:40,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642078011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:40,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:40,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-04 19:30:40,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216211851] [2021-10-04 19:30:40,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-04 19:30:40,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:40,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-04 19:30:40,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-04 19:30:40,680 INFO L87 Difference]: Start difference. First operand 92 states and 228 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:41,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:41,115 INFO L93 Difference]: Finished difference Result 144 states and 350 transitions. [2021-10-04 19:30:41,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-04 19:30:41,115 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 19:30:41,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:41,117 INFO L225 Difference]: With dead ends: 144 [2021-10-04 19:30:41,117 INFO L226 Difference]: Without dead ends: 122 [2021-10-04 19:30:41,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 390.5ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-10-04 19:30:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-04 19:30:41,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2021-10-04 19:30:41,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.493827160493827) internal successors, (202), 81 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2021-10-04 19:30:41,126 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 17 [2021-10-04 19:30:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:41,126 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2021-10-04 19:30:41,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2021-10-04 19:30:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 19:30:41,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:41,128 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:41,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:41,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:41,343 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:41,344 INFO L82 PathProgramCache]: Analyzing trace with hash -419863205, now seen corresponding path program 5 times [2021-10-04 19:30:41,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:41,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165273125] [2021-10-04 19:30:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:41,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:41,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:41,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165273125] [2021-10-04 19:30:41,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165273125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:41,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967622863] [2021-10-04 19:30:41,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:30:41,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:41,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:41,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:41,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-04 19:30:41,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:30:41,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:41,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 19:30:41,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:41,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967622863] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:41,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:41,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-04 19:30:41,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188317536] [2021-10-04 19:30:41,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 19:30:41,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:41,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 19:30:41,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-04 19:30:41,972 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:42,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:42,358 INFO L93 Difference]: Finished difference Result 140 states and 321 transitions. [2021-10-04 19:30:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 19:30:42,359 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 19:30:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:42,360 INFO L225 Difference]: With dead ends: 140 [2021-10-04 19:30:42,360 INFO L226 Difference]: Without dead ends: 114 [2021-10-04 19:30:42,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 393.5ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-10-04 19:30:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-04 19:30:42,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2021-10-04 19:30:42,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.5242718446601944) internal successors, (260), 103 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:42,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 260 transitions. [2021-10-04 19:30:42,383 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 260 transitions. Word has length 17 [2021-10-04 19:30:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:42,384 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 260 transitions. [2021-10-04 19:30:42,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:42,384 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 260 transitions. [2021-10-04 19:30:42,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 19:30:42,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:42,386 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:42,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:42,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:42,594 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:42,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:42,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1110452917, now seen corresponding path program 6 times [2021-10-04 19:30:42,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:42,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005601541] [2021-10-04 19:30:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:42,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:42,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:42,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005601541] [2021-10-04 19:30:42,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005601541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:42,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050805695] [2021-10-04 19:30:42,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:30:42,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:42,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:42,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:42,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-04 19:30:42,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-04 19:30:42,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:42,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-04 19:30:42,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:43,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050805695] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:43,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:43,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 19:30:43,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231977364] [2021-10-04 19:30:43,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 19:30:43,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:43,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 19:30:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-04 19:30:43,294 INFO L87 Difference]: Start difference. First operand 104 states and 260 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:43,749 INFO L93 Difference]: Finished difference Result 156 states and 380 transitions. [2021-10-04 19:30:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 19:30:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 19:30:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:43,752 INFO L225 Difference]: With dead ends: 156 [2021-10-04 19:30:43,752 INFO L226 Difference]: Without dead ends: 134 [2021-10-04 19:30:43,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 427.1ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-10-04 19:30:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-04 19:30:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 90. [2021-10-04 19:30:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.5168539325842696) internal successors, (224), 89 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 224 transitions. [2021-10-04 19:30:43,778 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 224 transitions. Word has length 17 [2021-10-04 19:30:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:43,780 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 224 transitions. [2021-10-04 19:30:43,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:43,781 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 224 transitions. [2021-10-04 19:30:43,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 19:30:43,783 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:43,783 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:43,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:43,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:43,997 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:43,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:43,998 INFO L82 PathProgramCache]: Analyzing trace with hash 996174639, now seen corresponding path program 7 times [2021-10-04 19:30:43,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:43,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284062003] [2021-10-04 19:30:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:43,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:44,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:44,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284062003] [2021-10-04 19:30:44,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284062003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:44,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147417410] [2021-10-04 19:30:44,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:30:44,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:44,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:44,134 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:44,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-04 19:30:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:44,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-04 19:30:44,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:44,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147417410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:44,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:44,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-04 19:30:44,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848772033] [2021-10-04 19:30:44,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-04 19:30:44,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:44,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-04 19:30:44,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-04 19:30:44,612 INFO L87 Difference]: Start difference. First operand 90 states and 224 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:44,891 INFO L93 Difference]: Finished difference Result 135 states and 330 transitions. [2021-10-04 19:30:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-04 19:30:44,891 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 19:30:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:44,894 INFO L225 Difference]: With dead ends: 135 [2021-10-04 19:30:44,895 INFO L226 Difference]: Without dead ends: 130 [2021-10-04 19:30:44,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:30:44,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-04 19:30:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2021-10-04 19:30:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.5714285714285716) internal successors, (270), 105 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:44,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 270 transitions. [2021-10-04 19:30:44,916 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 270 transitions. Word has length 17 [2021-10-04 19:30:44,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:44,916 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 270 transitions. [2021-10-04 19:30:44,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:44,917 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 270 transitions. [2021-10-04 19:30:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 19:30:44,919 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:44,919 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:44,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:45,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:45,137 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:45,137 INFO L82 PathProgramCache]: Analyzing trace with hash 305584927, now seen corresponding path program 8 times [2021-10-04 19:30:45,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:45,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545254341] [2021-10-04 19:30:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:45,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:45,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:45,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545254341] [2021-10-04 19:30:45,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545254341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:45,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694493327] [2021-10-04 19:30:45,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:30:45,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:45,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:45,286 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:45,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-04 19:30:45,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:30:45,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-04 19:30:45,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:45,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694493327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:45,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:45,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-10-04 19:30:45,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428709035] [2021-10-04 19:30:45,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 19:30:45,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:45,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 19:30:45,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-04 19:30:45,723 INFO L87 Difference]: Start difference. First operand 106 states and 270 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:46,096 INFO L93 Difference]: Finished difference Result 196 states and 482 transitions. [2021-10-04 19:30:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 19:30:46,096 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 19:30:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:46,099 INFO L225 Difference]: With dead ends: 196 [2021-10-04 19:30:46,099 INFO L226 Difference]: Without dead ends: 170 [2021-10-04 19:30:46,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 296.1ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-10-04 19:30:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-04 19:30:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 108. [2021-10-04 19:30:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.607476635514019) internal successors, (279), 107 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 279 transitions. [2021-10-04 19:30:46,108 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 279 transitions. Word has length 17 [2021-10-04 19:30:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:46,109 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 279 transitions. [2021-10-04 19:30:46,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 279 transitions. [2021-10-04 19:30:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 19:30:46,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:46,110 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:46,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:46,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-04 19:30:46,325 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:46,326 INFO L82 PathProgramCache]: Analyzing trace with hash 537885807, now seen corresponding path program 9 times [2021-10-04 19:30:46,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:46,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644490790] [2021-10-04 19:30:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:46,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:46,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:46,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644490790] [2021-10-04 19:30:46,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644490790] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:46,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417209867] [2021-10-04 19:30:46,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:30:46,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:46,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:46,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:46,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-04 19:30:46,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-04 19:30:46,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:46,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-04 19:30:46,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:47,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417209867] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:47,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:47,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-10-04 19:30:47,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818222049] [2021-10-04 19:30:47,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 19:30:47,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:47,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 19:30:47,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-04 19:30:47,018 INFO L87 Difference]: Start difference. First operand 108 states and 279 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:47,365 INFO L93 Difference]: Finished difference Result 178 states and 441 transitions. [2021-10-04 19:30:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 19:30:47,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 19:30:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:47,369 INFO L225 Difference]: With dead ends: 178 [2021-10-04 19:30:47,372 INFO L226 Difference]: Without dead ends: 152 [2021-10-04 19:30:47,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:30:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-04 19:30:47,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 110. [2021-10-04 19:30:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.623853211009174) internal successors, (286), 109 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 286 transitions. [2021-10-04 19:30:47,389 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 286 transitions. Word has length 17 [2021-10-04 19:30:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:47,390 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 286 transitions. [2021-10-04 19:30:47,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 286 transitions. [2021-10-04 19:30:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-04 19:30:47,391 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:47,392 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:47,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:47,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-04 19:30:47,610 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1624552734, now seen corresponding path program 10 times [2021-10-04 19:30:47,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:47,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206266230] [2021-10-04 19:30:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:47,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:47,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:47,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206266230] [2021-10-04 19:30:47,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206266230] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:47,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138694196] [2021-10-04 19:30:47,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:30:47,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:47,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:47,674 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:47,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-04 19:30:47,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:30:47,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:47,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 19:30:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:48,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138694196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:48,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:48,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 13 [2021-10-04 19:30:48,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034410569] [2021-10-04 19:30:48,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 19:30:48,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:48,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 19:30:48,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-10-04 19:30:48,244 INFO L87 Difference]: Start difference. First operand 110 states and 286 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:48,508 INFO L93 Difference]: Finished difference Result 198 states and 496 transitions. [2021-10-04 19:30:48,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-04 19:30:48,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-04 19:30:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:48,510 INFO L225 Difference]: With dead ends: 198 [2021-10-04 19:30:48,510 INFO L226 Difference]: Without dead ends: 198 [2021-10-04 19:30:48,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-10-04 19:30:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-04 19:30:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 122. [2021-10-04 19:30:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.6115702479338845) internal successors, (316), 121 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 316 transitions. [2021-10-04 19:30:48,522 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 316 transitions. Word has length 19 [2021-10-04 19:30:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:48,522 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 316 transitions. [2021-10-04 19:30:48,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 316 transitions. [2021-10-04 19:30:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-04 19:30:48,523 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:48,523 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:48,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:48,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:48,724 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash 158794226, now seen corresponding path program 11 times [2021-10-04 19:30:48,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:48,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647264696] [2021-10-04 19:30:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:48,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:48,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:48,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647264696] [2021-10-04 19:30:48,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647264696] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:48,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974055899] [2021-10-04 19:30:48,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:30:48,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:48,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:48,771 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:48,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-04 19:30:48,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-04 19:30:48,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:48,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-04 19:30:48,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:49,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974055899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:49,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:49,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-04 19:30:49,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593979501] [2021-10-04 19:30:49,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-04 19:30:49,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:49,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-04 19:30:49,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-04 19:30:49,031 INFO L87 Difference]: Start difference. First operand 122 states and 316 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:49,054 INFO L93 Difference]: Finished difference Result 192 states and 472 transitions. [2021-10-04 19:30:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 19:30:49,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-04 19:30:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:49,056 INFO L225 Difference]: With dead ends: 192 [2021-10-04 19:30:49,056 INFO L226 Difference]: Without dead ends: 192 [2021-10-04 19:30:49,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-04 19:30:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-04 19:30:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 134. [2021-10-04 19:30:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.6466165413533833) internal successors, (352), 133 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 352 transitions. [2021-10-04 19:30:49,064 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 352 transitions. Word has length 19 [2021-10-04 19:30:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:49,064 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 352 transitions. [2021-10-04 19:30:49,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 352 transitions. [2021-10-04 19:30:49,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-04 19:30:49,065 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:49,065 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:49,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:49,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-04 19:30:49,280 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:49,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:49,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1930077271, now seen corresponding path program 12 times [2021-10-04 19:30:49,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:49,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420744744] [2021-10-04 19:30:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:49,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:30:49,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:49,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420744744] [2021-10-04 19:30:49,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420744744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:49,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376020384] [2021-10-04 19:30:49,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:30:49,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:49,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:49,439 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:49,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-04 19:30:49,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-04 19:30:49,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:49,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 19:30:49,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:49,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376020384] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:49,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:49,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-04 19:30:49,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050369644] [2021-10-04 19:30:49,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 19:30:49,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:49,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 19:30:49,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-04 19:30:49,977 INFO L87 Difference]: Start difference. First operand 134 states and 352 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:50,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:50,734 INFO L93 Difference]: Finished difference Result 236 states and 584 transitions. [2021-10-04 19:30:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-04 19:30:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-04 19:30:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:50,736 INFO L225 Difference]: With dead ends: 236 [2021-10-04 19:30:50,737 INFO L226 Difference]: Without dead ends: 194 [2021-10-04 19:30:50,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 630.0ms TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-10-04 19:30:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-04 19:30:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 168. [2021-10-04 19:30:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-10-04 19:30:50,745 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 19 [2021-10-04 19:30:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:50,745 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-10-04 19:30:50,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-10-04 19:30:50,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-04 19:30:50,747 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:50,747 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:50,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-04 19:30:50,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:50,961 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:50,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash -658569481, now seen corresponding path program 13 times [2021-10-04 19:30:50,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:50,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958826300] [2021-10-04 19:30:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:50,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:51,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:51,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958826300] [2021-10-04 19:30:51,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958826300] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:51,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764992221] [2021-10-04 19:30:51,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:30:51,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:51,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:51,127 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:51,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-04 19:30:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:51,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-04 19:30:51,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:51,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764992221] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:51,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:51,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-04 19:30:51,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853983129] [2021-10-04 19:30:51,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-04 19:30:51,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:51,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-04 19:30:51,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-04 19:30:51,718 INFO L87 Difference]: Start difference. First operand 168 states and 440 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:52,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:52,277 INFO L93 Difference]: Finished difference Result 302 states and 782 transitions. [2021-10-04 19:30:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-04 19:30:52,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-04 19:30:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:52,281 INFO L225 Difference]: With dead ends: 302 [2021-10-04 19:30:52,281 INFO L226 Difference]: Without dead ends: 280 [2021-10-04 19:30:52,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-10-04 19:30:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-04 19:30:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 168. [2021-10-04 19:30:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:52,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-10-04 19:30:52,291 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 19 [2021-10-04 19:30:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:52,291 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-10-04 19:30:52,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-10-04 19:30:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-04 19:30:52,292 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:52,292 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:52,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:52,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-04 19:30:52,507 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:52,508 INFO L82 PathProgramCache]: Analyzing trace with hash -426268601, now seen corresponding path program 14 times [2021-10-04 19:30:52,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:52,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972945847] [2021-10-04 19:30:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:52,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:52,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:52,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972945847] [2021-10-04 19:30:52,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972945847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:52,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157698492] [2021-10-04 19:30:52,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:30:52,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:52,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:52,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:52,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-04 19:30:52,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:30:52,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:52,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-04 19:30:52,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:53,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157698492] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:53,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:53,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-04 19:30:53,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857777320] [2021-10-04 19:30:53,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 19:30:53,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:53,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 19:30:53,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-04 19:30:53,327 INFO L87 Difference]: Start difference. First operand 168 states and 440 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:53,806 INFO L93 Difference]: Finished difference Result 278 states and 718 transitions. [2021-10-04 19:30:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-04 19:30:53,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-04 19:30:53,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:53,809 INFO L225 Difference]: With dead ends: 278 [2021-10-04 19:30:53,809 INFO L226 Difference]: Without dead ends: 256 [2021-10-04 19:30:53,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 411.0ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-10-04 19:30:53,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-10-04 19:30:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 168. [2021-10-04 19:30:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-10-04 19:30:53,818 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 19 [2021-10-04 19:30:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:53,819 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-10-04 19:30:53,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-10-04 19:30:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:30:53,820 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:53,821 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:53,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:54,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-04 19:30:54,035 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:54,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:54,036 INFO L82 PathProgramCache]: Analyzing trace with hash 211037830, now seen corresponding path program 15 times [2021-10-04 19:30:54,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:54,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826328002] [2021-10-04 19:30:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:54,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:30:54,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:54,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826328002] [2021-10-04 19:30:54,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826328002] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:54,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428989293] [2021-10-04 19:30:54,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:30:54,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:54,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:54,253 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:54,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-04 19:30:54,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-04 19:30:54,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:54,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 19:30:54,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:54,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428989293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:54,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:54,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-04 19:30:54,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139669735] [2021-10-04 19:30:54,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:30:54,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:54,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:30:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:30:54,976 INFO L87 Difference]: Start difference. First operand 168 states and 440 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:55,938 INFO L93 Difference]: Finished difference Result 276 states and 678 transitions. [2021-10-04 19:30:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-04 19:30:55,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:30:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:55,941 INFO L225 Difference]: With dead ends: 276 [2021-10-04 19:30:55,941 INFO L226 Difference]: Without dead ends: 220 [2021-10-04 19:30:55,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 845.3ms TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-10-04 19:30:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-04 19:30:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 194. [2021-10-04 19:30:55,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.6373056994818653) internal successors, (509), 193 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 509 transitions. [2021-10-04 19:30:55,950 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 509 transitions. Word has length 21 [2021-10-04 19:30:55,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:55,951 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 509 transitions. [2021-10-04 19:30:55,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 509 transitions. [2021-10-04 19:30:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:30:55,952 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:55,952 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:55,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:56,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-04 19:30:56,168 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:56,169 INFO L82 PathProgramCache]: Analyzing trace with hash -187129914, now seen corresponding path program 16 times [2021-10-04 19:30:56,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:56,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797399122] [2021-10-04 19:30:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:56,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:30:56,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:56,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797399122] [2021-10-04 19:30:56,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797399122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:56,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53440394] [2021-10-04 19:30:56,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:30:56,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:56,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:56,398 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:56,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-04 19:30:56,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:30:56,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:56,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 19:30:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:57,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53440394] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:57,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:57,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-04 19:30:57,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987189734] [2021-10-04 19:30:57,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-04 19:30:57,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:57,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-04 19:30:57,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:30:57,143 INFO L87 Difference]: Start difference. First operand 194 states and 509 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:57,804 INFO L93 Difference]: Finished difference Result 282 states and 697 transitions. [2021-10-04 19:30:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 19:30:57,804 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:30:57,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:57,806 INFO L225 Difference]: With dead ends: 282 [2021-10-04 19:30:57,806 INFO L226 Difference]: Without dead ends: 242 [2021-10-04 19:30:57,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-10-04 19:30:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-04 19:30:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 208. [2021-10-04 19:30:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.608695652173913) internal successors, (540), 207 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 540 transitions. [2021-10-04 19:30:57,816 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 540 transitions. Word has length 21 [2021-10-04 19:30:57,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:57,816 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 540 transitions. [2021-10-04 19:30:57,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:57,817 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 540 transitions. [2021-10-04 19:30:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:30:57,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:57,818 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:57,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:58,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-04 19:30:58,033 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:58,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:58,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1185498022, now seen corresponding path program 17 times [2021-10-04 19:30:58,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:58,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678848411] [2021-10-04 19:30:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:58,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:30:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:30:58,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:30:58,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678848411] [2021-10-04 19:30:58,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678848411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:58,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425557116] [2021-10-04 19:30:58,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:30:58,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:58,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:30:58,204 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:30:58,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-04 19:30:58,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-04 19:30:58,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:30:58,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 19:30:58,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:30:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:30:58,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425557116] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:30:58,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:30:58,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-04 19:30:58,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027384509] [2021-10-04 19:30:58,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 19:30:58,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:30:58,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 19:30:58,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-10-04 19:30:58,920 INFO L87 Difference]: Start difference. First operand 208 states and 540 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:30:59,707 INFO L93 Difference]: Finished difference Result 288 states and 735 transitions. [2021-10-04 19:30:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-04 19:30:59,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:30:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:30:59,711 INFO L225 Difference]: With dead ends: 288 [2021-10-04 19:30:59,711 INFO L226 Difference]: Without dead ends: 266 [2021-10-04 19:30:59,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 701.8ms TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2021-10-04 19:30:59,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-10-04 19:30:59,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 192. [2021-10-04 19:30:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.6178010471204187) internal successors, (500), 191 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 500 transitions. [2021-10-04 19:30:59,730 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 500 transitions. Word has length 21 [2021-10-04 19:30:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:30:59,731 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 500 transitions. [2021-10-04 19:30:59,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:30:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 500 transitions. [2021-10-04 19:30:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:30:59,733 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:30:59,733 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:30:59,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-04 19:30:59,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:30:59,947 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:30:59,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:30:59,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1539323190, now seen corresponding path program 18 times [2021-10-04 19:30:59,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:30:59,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516740147] [2021-10-04 19:30:59,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:30:59,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:30:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:31:00,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:00,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516740147] [2021-10-04 19:31:00,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516740147] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:00,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669319745] [2021-10-04 19:31:00,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:31:00,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:00,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:00,166 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:00,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-04 19:31:00,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-04 19:31:00,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:00,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 19:31:00,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:00,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669319745] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:00,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:00,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-04 19:31:00,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701610986] [2021-10-04 19:31:00,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:31:00,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:00,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:31:00,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:31:00,923 INFO L87 Difference]: Start difference. First operand 192 states and 500 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:02,000 INFO L93 Difference]: Finished difference Result 386 states and 986 transitions. [2021-10-04 19:31:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-04 19:31:02,000 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:02,004 INFO L225 Difference]: With dead ends: 386 [2021-10-04 19:31:02,004 INFO L226 Difference]: Without dead ends: 328 [2021-10-04 19:31:02,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 893.9ms TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2021-10-04 19:31:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-10-04 19:31:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 258. [2021-10-04 19:31:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.6264591439688716) internal successors, (675), 257 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 675 transitions. [2021-10-04 19:31:02,016 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 675 transitions. Word has length 21 [2021-10-04 19:31:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:02,016 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 675 transitions. [2021-10-04 19:31:02,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 675 transitions. [2021-10-04 19:31:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:02,017 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:02,018 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:02,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:02,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:02,232 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:02,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1247869002, now seen corresponding path program 19 times [2021-10-04 19:31:02,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:02,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390593262] [2021-10-04 19:31:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:02,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:31:02,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:02,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390593262] [2021-10-04 19:31:02,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390593262] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:02,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063928211] [2021-10-04 19:31:02,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:31:02,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:02,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:02,414 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:02,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-04 19:31:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:02,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 19:31:02,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:03,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063928211] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:03,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:03,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-04 19:31:03,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15966734] [2021-10-04 19:31:03,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:31:03,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:03,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:31:03,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:31:03,201 INFO L87 Difference]: Start difference. First operand 258 states and 675 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:03,753 INFO L93 Difference]: Finished difference Result 442 states and 1143 transitions. [2021-10-04 19:31:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-04 19:31:03,753 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:03,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:03,760 INFO L225 Difference]: With dead ends: 442 [2021-10-04 19:31:03,760 INFO L226 Difference]: Without dead ends: 412 [2021-10-04 19:31:03,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-10-04 19:31:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-10-04 19:31:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 284. [2021-10-04 19:31:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.664310954063604) internal successors, (754), 283 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 754 transitions. [2021-10-04 19:31:03,783 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 754 transitions. Word has length 21 [2021-10-04 19:31:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:03,785 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 754 transitions. [2021-10-04 19:31:03,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 754 transitions. [2021-10-04 19:31:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:03,788 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:03,788 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:03,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-04 19:31:04,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:04,002 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:04,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1049323562, now seen corresponding path program 20 times [2021-10-04 19:31:04,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:04,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290736889] [2021-10-04 19:31:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:04,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:04,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:04,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290736889] [2021-10-04 19:31:04,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290736889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:04,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876852328] [2021-10-04 19:31:04,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:31:04,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:04,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:04,212 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:04,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-04 19:31:04,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:31:04,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:04,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-04 19:31:04,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:05,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876852328] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:05,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:05,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-04 19:31:05,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556412112] [2021-10-04 19:31:05,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:31:05,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:05,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:31:05,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:31:05,051 INFO L87 Difference]: Start difference. First operand 284 states and 754 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:05,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:05,822 INFO L93 Difference]: Finished difference Result 472 states and 1237 transitions. [2021-10-04 19:31:05,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 19:31:05,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:05,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:05,827 INFO L225 Difference]: With dead ends: 472 [2021-10-04 19:31:05,827 INFO L226 Difference]: Without dead ends: 450 [2021-10-04 19:31:05,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 724.5ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-10-04 19:31:05,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-10-04 19:31:05,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 284. [2021-10-04 19:31:05,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.664310954063604) internal successors, (754), 283 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 754 transitions. [2021-10-04 19:31:05,839 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 754 transitions. Word has length 21 [2021-10-04 19:31:05,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:05,839 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 754 transitions. [2021-10-04 19:31:05,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 754 transitions. [2021-10-04 19:31:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:05,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:05,841 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:05,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:06,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-04 19:31:06,055 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:06,056 INFO L82 PathProgramCache]: Analyzing trace with hash -87123322, now seen corresponding path program 21 times [2021-10-04 19:31:06,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:06,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448193480] [2021-10-04 19:31:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:06,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:31:06,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:06,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448193480] [2021-10-04 19:31:06,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448193480] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:06,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877101873] [2021-10-04 19:31:06,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:31:06,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:06,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:06,262 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:06,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-04 19:31:06,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-04 19:31:06,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:06,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 19:31:06,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:07,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877101873] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:07,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:07,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-04 19:31:07,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265652621] [2021-10-04 19:31:07,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:31:07,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:07,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:31:07,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:31:07,092 INFO L87 Difference]: Start difference. First operand 284 states and 754 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:08,169 INFO L93 Difference]: Finished difference Result 502 states and 1307 transitions. [2021-10-04 19:31:08,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-04 19:31:08,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:08,173 INFO L225 Difference]: With dead ends: 502 [2021-10-04 19:31:08,173 INFO L226 Difference]: Without dead ends: 444 [2021-10-04 19:31:08,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 904.6ms TimeCoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2021-10-04 19:31:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-10-04 19:31:08,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 346. [2021-10-04 19:31:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.6753623188405795) internal successors, (923), 345 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 923 transitions. [2021-10-04 19:31:08,187 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 923 transitions. Word has length 21 [2021-10-04 19:31:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:08,187 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 923 transitions. [2021-10-04 19:31:08,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 923 transitions. [2021-10-04 19:31:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:08,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:08,189 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:08,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:08,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:08,404 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:08,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:08,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1420651782, now seen corresponding path program 22 times [2021-10-04 19:31:08,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:08,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113468394] [2021-10-04 19:31:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:08,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:31:08,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:08,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113468394] [2021-10-04 19:31:08,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113468394] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:08,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407519770] [2021-10-04 19:31:08,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:31:08,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:08,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:08,565 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:08,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-04 19:31:09,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:31:09,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:09,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 19:31:09,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:09,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407519770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:09,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:09,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-04 19:31:09,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30449814] [2021-10-04 19:31:09,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:31:09,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:09,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:31:09,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:31:09,479 INFO L87 Difference]: Start difference. First operand 346 states and 923 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:10,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:10,199 INFO L93 Difference]: Finished difference Result 550 states and 1445 transitions. [2021-10-04 19:31:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-04 19:31:10,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:10,203 INFO L225 Difference]: With dead ends: 550 [2021-10-04 19:31:10,203 INFO L226 Difference]: Without dead ends: 520 [2021-10-04 19:31:10,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 638.2ms TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2021-10-04 19:31:10,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-10-04 19:31:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 296. [2021-10-04 19:31:10,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.664406779661017) internal successors, (786), 295 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 786 transitions. [2021-10-04 19:31:10,216 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 786 transitions. Word has length 21 [2021-10-04 19:31:10,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:10,216 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 786 transitions. [2021-10-04 19:31:10,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:10,216 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 786 transitions. [2021-10-04 19:31:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:10,217 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:10,217 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:10,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:10,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-04 19:31:10,431 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:10,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1619197222, now seen corresponding path program 23 times [2021-10-04 19:31:10,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:10,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814024982] [2021-10-04 19:31:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:10,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:10,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:10,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814024982] [2021-10-04 19:31:10,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814024982] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:10,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405505016] [2021-10-04 19:31:10,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:31:10,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:10,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:10,633 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:10,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-04 19:31:11,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-04 19:31:11,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:11,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-04 19:31:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:11,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405505016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:11,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:11,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-04 19:31:11,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237838096] [2021-10-04 19:31:11,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:31:11,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:11,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:31:11,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:31:11,485 INFO L87 Difference]: Start difference. First operand 296 states and 786 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:12,290 INFO L93 Difference]: Finished difference Result 512 states and 1341 transitions. [2021-10-04 19:31:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-04 19:31:12,290 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:12,293 INFO L225 Difference]: With dead ends: 512 [2021-10-04 19:31:12,293 INFO L226 Difference]: Without dead ends: 490 [2021-10-04 19:31:12,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 674.0ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-10-04 19:31:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-10-04 19:31:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 296. [2021-10-04 19:31:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.671186440677966) internal successors, (788), 295 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 788 transitions. [2021-10-04 19:31:12,305 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 788 transitions. Word has length 21 [2021-10-04 19:31:12,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:12,305 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 788 transitions. [2021-10-04 19:31:12,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 788 transitions. [2021-10-04 19:31:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:12,307 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:12,307 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:12,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:12,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-04 19:31:12,522 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:12,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1551206794, now seen corresponding path program 24 times [2021-10-04 19:31:12,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:12,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256446270] [2021-10-04 19:31:12,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:12,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:12,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:12,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256446270] [2021-10-04 19:31:12,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256446270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:12,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683643902] [2021-10-04 19:31:12,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:31:12,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:12,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:12,700 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:12,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-04 19:31:13,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-04 19:31:13,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:13,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 19:31:13,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:13,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683643902] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:13,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:13,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-04 19:31:13,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216290035] [2021-10-04 19:31:13,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:31:13,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:13,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:31:13,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:31:13,586 INFO L87 Difference]: Start difference. First operand 296 states and 788 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:14,515 INFO L93 Difference]: Finished difference Result 536 states and 1411 transitions. [2021-10-04 19:31:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-04 19:31:14,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:14,519 INFO L225 Difference]: With dead ends: 536 [2021-10-04 19:31:14,519 INFO L226 Difference]: Without dead ends: 514 [2021-10-04 19:31:14,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 838.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-10-04 19:31:14,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-10-04 19:31:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 292. [2021-10-04 19:31:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.6666666666666665) internal successors, (776), 291 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 776 transitions. [2021-10-04 19:31:14,530 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 776 transitions. Word has length 21 [2021-10-04 19:31:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:14,531 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 776 transitions. [2021-10-04 19:31:14,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 776 transitions. [2021-10-04 19:31:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:14,532 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:14,532 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:14,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-04 19:31:14,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-04 19:31:14,746 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:14,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:14,747 INFO L82 PathProgramCache]: Analyzing trace with hash 366384730, now seen corresponding path program 25 times [2021-10-04 19:31:14,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:14,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208764155] [2021-10-04 19:31:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:14,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:14,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:14,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208764155] [2021-10-04 19:31:14,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208764155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:14,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492928608] [2021-10-04 19:31:14,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:31:14,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:14,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:14,942 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:14,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-04 19:31:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:15,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 19:31:15,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:15,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492928608] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:15,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:15,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-04 19:31:15,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397529246] [2021-10-04 19:31:15,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-04 19:31:15,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-04 19:31:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-10-04 19:31:15,939 INFO L87 Difference]: Start difference. First operand 292 states and 776 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:16,399 INFO L93 Difference]: Finished difference Result 384 states and 971 transitions. [2021-10-04 19:31:16,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-04 19:31:16,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:16,402 INFO L225 Difference]: With dead ends: 384 [2021-10-04 19:31:16,402 INFO L226 Difference]: Without dead ends: 374 [2021-10-04 19:31:16,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-10-04 19:31:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-10-04 19:31:16,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 300. [2021-10-04 19:31:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.6755852842809364) internal successors, (800), 299 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 800 transitions. [2021-10-04 19:31:16,414 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 800 transitions. Word has length 21 [2021-10-04 19:31:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:16,414 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 800 transitions. [2021-10-04 19:31:16,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 800 transitions. [2021-10-04 19:31:16,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:16,416 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:16,416 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:16,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:16,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-04 19:31:16,632 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:16,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:16,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1865364918, now seen corresponding path program 26 times [2021-10-04 19:31:16,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:16,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002471772] [2021-10-04 19:31:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:16,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:16,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:16,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002471772] [2021-10-04 19:31:16,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002471772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:16,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202313597] [2021-10-04 19:31:16,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:31:16,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:16,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:16,819 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:16,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-04 19:31:17,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:31:17,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:17,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 19:31:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:17,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202313597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:17,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:17,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-04 19:31:17,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626604304] [2021-10-04 19:31:17,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-04 19:31:17,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:17,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-04 19:31:17,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:31:17,777 INFO L87 Difference]: Start difference. First operand 300 states and 800 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:18,697 INFO L93 Difference]: Finished difference Result 483 states and 1224 transitions. [2021-10-04 19:31:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-04 19:31:18,698 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:18,701 INFO L225 Difference]: With dead ends: 483 [2021-10-04 19:31:18,701 INFO L226 Difference]: Without dead ends: 452 [2021-10-04 19:31:18,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 739.8ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-10-04 19:31:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-10-04 19:31:18,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 316. [2021-10-04 19:31:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.704761904761905) internal successors, (852), 315 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 852 transitions. [2021-10-04 19:31:18,712 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 852 transitions. Word has length 21 [2021-10-04 19:31:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:18,712 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 852 transitions. [2021-10-04 19:31:18,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 852 transitions. [2021-10-04 19:31:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:18,714 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:18,714 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:18,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:18,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-04 19:31:18,928 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:18,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1962518630, now seen corresponding path program 27 times [2021-10-04 19:31:18,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:18,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161394527] [2021-10-04 19:31:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:18,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:19,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:19,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161394527] [2021-10-04 19:31:19,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161394527] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:19,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282257289] [2021-10-04 19:31:19,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:31:19,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:19,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:19,098 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:19,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-04 19:31:19,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-04 19:31:19,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:19,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 19:31:19,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:20,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282257289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:20,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:20,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-04 19:31:20,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172696820] [2021-10-04 19:31:20,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-04 19:31:20,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:20,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-04 19:31:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:31:20,050 INFO L87 Difference]: Start difference. First operand 316 states and 852 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:20,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:20,816 INFO L93 Difference]: Finished difference Result 509 states and 1321 transitions. [2021-10-04 19:31:20,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-04 19:31:20,817 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:20,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:20,820 INFO L225 Difference]: With dead ends: 509 [2021-10-04 19:31:20,820 INFO L226 Difference]: Without dead ends: 478 [2021-10-04 19:31:20,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 621.8ms TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-10-04 19:31:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-10-04 19:31:20,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 336. [2021-10-04 19:31:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.716417910447761) internal successors, (910), 335 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 910 transitions. [2021-10-04 19:31:20,838 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 910 transitions. Word has length 21 [2021-10-04 19:31:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:20,838 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 910 transitions. [2021-10-04 19:31:20,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 910 transitions. [2021-10-04 19:31:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:20,840 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:20,840 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:20,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:21,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-04 19:31:21,054 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1874159834, now seen corresponding path program 28 times [2021-10-04 19:31:21,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:21,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958787442] [2021-10-04 19:31:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:21,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:21,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:21,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958787442] [2021-10-04 19:31:21,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958787442] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:21,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756843656] [2021-10-04 19:31:21,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:31:21,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:21,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:21,252 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:21,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-04 19:31:21,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:31:21,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:21,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 19:31:21,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:22,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756843656] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:22,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:22,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-04 19:31:22,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668188570] [2021-10-04 19:31:22,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-04 19:31:22,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-04 19:31:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-10-04 19:31:22,224 INFO L87 Difference]: Start difference. First operand 336 states and 910 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:22,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:22,910 INFO L93 Difference]: Finished difference Result 573 states and 1516 transitions. [2021-10-04 19:31:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-04 19:31:22,910 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:22,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:22,914 INFO L225 Difference]: With dead ends: 573 [2021-10-04 19:31:22,914 INFO L226 Difference]: Without dead ends: 538 [2021-10-04 19:31:22,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 616.2ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-10-04 19:31:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-10-04 19:31:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 338. [2021-10-04 19:31:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.72106824925816) internal successors, (917), 337 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 917 transitions. [2021-10-04 19:31:22,926 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 917 transitions. Word has length 21 [2021-10-04 19:31:22,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:22,926 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 917 transitions. [2021-10-04 19:31:22,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 917 transitions. [2021-10-04 19:31:22,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:22,928 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:22,928 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:22,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-04 19:31:23,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:23,143 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:23,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:23,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1531672310, now seen corresponding path program 29 times [2021-10-04 19:31:23,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:23,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564745610] [2021-10-04 19:31:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:23,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:23,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:23,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564745610] [2021-10-04 19:31:23,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564745610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:23,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062415906] [2021-10-04 19:31:23,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:31:23,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:23,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:23,339 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:23,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-04 19:31:23,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-04 19:31:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:23,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 19:31:23,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:24,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062415906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:24,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:24,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-04 19:31:24,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189842666] [2021-10-04 19:31:24,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-04 19:31:24,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-04 19:31:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-10-04 19:31:24,319 INFO L87 Difference]: Start difference. First operand 338 states and 917 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:25,167 INFO L93 Difference]: Finished difference Result 572 states and 1485 transitions. [2021-10-04 19:31:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-04 19:31:25,168 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:25,172 INFO L225 Difference]: With dead ends: 572 [2021-10-04 19:31:25,172 INFO L226 Difference]: Without dead ends: 562 [2021-10-04 19:31:25,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 737.3ms TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2021-10-04 19:31:25,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-10-04 19:31:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 378. [2021-10-04 19:31:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.750663129973475) internal successors, (1037), 377 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1037 transitions. [2021-10-04 19:31:25,184 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1037 transitions. Word has length 21 [2021-10-04 19:31:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:25,185 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1037 transitions. [2021-10-04 19:31:25,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:25,185 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1037 transitions. [2021-10-04 19:31:25,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:25,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:25,187 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:25,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:25,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-04 19:31:25,403 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:25,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:25,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2072705274, now seen corresponding path program 30 times [2021-10-04 19:31:25,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:25,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563878528] [2021-10-04 19:31:25,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:25,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:25,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:25,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563878528] [2021-10-04 19:31:25,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563878528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:25,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708513050] [2021-10-04 19:31:25,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:31:25,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:25,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:25,581 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:25,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-04 19:31:26,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-04 19:31:26,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:26,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 19:31:26,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:26,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708513050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:26,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:26,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-04 19:31:26,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034459319] [2021-10-04 19:31:26,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-04 19:31:26,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:26,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-04 19:31:26,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:31:26,597 INFO L87 Difference]: Start difference. First operand 378 states and 1037 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:27,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:27,782 INFO L93 Difference]: Finished difference Result 600 states and 1603 transitions. [2021-10-04 19:31:27,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-04 19:31:27,782 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:27,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:27,786 INFO L225 Difference]: With dead ends: 600 [2021-10-04 19:31:27,786 INFO L226 Difference]: Without dead ends: 582 [2021-10-04 19:31:27,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 958.9ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-10-04 19:31:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-10-04 19:31:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 378. [2021-10-04 19:31:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.7453580901856762) internal successors, (1035), 377 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1035 transitions. [2021-10-04 19:31:27,799 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1035 transitions. Word has length 21 [2021-10-04 19:31:27,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:27,799 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1035 transitions. [2021-10-04 19:31:27,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:27,799 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1035 transitions. [2021-10-04 19:31:27,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:27,801 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:27,801 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:27,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:28,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:28,015 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1989961142, now seen corresponding path program 31 times [2021-10-04 19:31:28,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:28,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673915454] [2021-10-04 19:31:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:28,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:28,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:28,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673915454] [2021-10-04 19:31:28,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673915454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:28,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406547866] [2021-10-04 19:31:28,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:31:28,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:28,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:28,204 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:28,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-04 19:31:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:28,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 19:31:28,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:29,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406547866] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:29,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:29,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-04 19:31:29,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454434798] [2021-10-04 19:31:29,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-04 19:31:29,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-04 19:31:29,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-10-04 19:31:29,229 INFO L87 Difference]: Start difference. First operand 378 states and 1035 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:30,299 INFO L93 Difference]: Finished difference Result 680 states and 1810 transitions. [2021-10-04 19:31:30,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-04 19:31:30,300 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:30,304 INFO L225 Difference]: With dead ends: 680 [2021-10-04 19:31:30,304 INFO L226 Difference]: Without dead ends: 658 [2021-10-04 19:31:30,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 805.6ms TimeCoverageRelationStatistics Valid=261, Invalid=1379, Unknown=0, NotChecked=0, Total=1640 [2021-10-04 19:31:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-10-04 19:31:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 408. [2021-10-04 19:31:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.7813267813267815) internal successors, (1132), 407 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1132 transitions. [2021-10-04 19:31:30,319 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1132 transitions. Word has length 21 [2021-10-04 19:31:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:30,320 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1132 transitions. [2021-10-04 19:31:30,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1132 transitions. [2021-10-04 19:31:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:30,322 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:30,322 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:30,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:30,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-04 19:31:30,537 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:30,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1612238671, now seen corresponding path program 32 times [2021-10-04 19:31:30,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:30,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809909776] [2021-10-04 19:31:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:30,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:31:30,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:30,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809909776] [2021-10-04 19:31:30,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809909776] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:30,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389873043] [2021-10-04 19:31:30,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:31:30,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:30,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:30,666 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:30,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-04 19:31:31,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:31:31,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:31,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 19:31:31,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:31,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389873043] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:31,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:31,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-04 19:31:31,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500094997] [2021-10-04 19:31:31,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 19:31:31,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 19:31:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-04 19:31:31,648 INFO L87 Difference]: Start difference. First operand 408 states and 1132 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:32,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:32,360 INFO L93 Difference]: Finished difference Result 498 states and 1364 transitions. [2021-10-04 19:31:32,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-04 19:31:32,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:32,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:32,364 INFO L225 Difference]: With dead ends: 498 [2021-10-04 19:31:32,364 INFO L226 Difference]: Without dead ends: 476 [2021-10-04 19:31:32,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 632.1ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-10-04 19:31:32,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-10-04 19:31:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 408. [2021-10-04 19:31:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.7714987714987713) internal successors, (1128), 407 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1128 transitions. [2021-10-04 19:31:32,376 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1128 transitions. Word has length 21 [2021-10-04 19:31:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:32,377 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1128 transitions. [2021-10-04 19:31:32,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1128 transitions. [2021-10-04 19:31:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:32,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:32,379 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:32,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:32,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:32,593 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:32,593 INFO L82 PathProgramCache]: Analyzing trace with hash -407109030, now seen corresponding path program 33 times [2021-10-04 19:31:32,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:32,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047169883] [2021-10-04 19:31:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:32,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:32,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:32,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047169883] [2021-10-04 19:31:32,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047169883] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:32,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980986946] [2021-10-04 19:31:32,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:31:32,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:32,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:32,759 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:32,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-04 19:31:33,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-04 19:31:33,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:33,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 19:31:33,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:33,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980986946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:33,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:33,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-04 19:31:33,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708204019] [2021-10-04 19:31:33,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-04 19:31:33,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:33,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-04 19:31:33,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:31:33,820 INFO L87 Difference]: Start difference. First operand 408 states and 1128 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:34,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:34,590 INFO L93 Difference]: Finished difference Result 525 states and 1417 transitions. [2021-10-04 19:31:34,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-04 19:31:34,590 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:34,594 INFO L225 Difference]: With dead ends: 525 [2021-10-04 19:31:34,594 INFO L226 Difference]: Without dead ends: 516 [2021-10-04 19:31:34,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 623.1ms TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-10-04 19:31:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-10-04 19:31:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 420. [2021-10-04 19:31:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.7732696897374702) internal successors, (1162), 419 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1162 transitions. [2021-10-04 19:31:34,605 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1162 transitions. Word has length 21 [2021-10-04 19:31:34,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:34,605 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1162 transitions. [2021-10-04 19:31:34,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:34,606 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1162 transitions. [2021-10-04 19:31:34,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:31:34,607 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:34,608 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:34,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:34,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:34,822 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:34,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:34,823 INFO L82 PathProgramCache]: Analyzing trace with hash -865397862, now seen corresponding path program 34 times [2021-10-04 19:31:34,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:34,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865573653] [2021-10-04 19:31:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:34,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:34,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:34,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865573653] [2021-10-04 19:31:34,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865573653] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:34,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718362891] [2021-10-04 19:31:34,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:31:34,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:34,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:34,987 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:35,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-04 19:31:35,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:31:35,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:35,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 19:31:35,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:36,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718362891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:36,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:36,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-04 19:31:36,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106610674] [2021-10-04 19:31:36,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-04 19:31:36,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:36,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-04 19:31:36,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-10-04 19:31:36,071 INFO L87 Difference]: Start difference. First operand 420 states and 1162 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:36,799 INFO L93 Difference]: Finished difference Result 612 states and 1656 transitions. [2021-10-04 19:31:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 19:31:36,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:31:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:36,803 INFO L225 Difference]: With dead ends: 612 [2021-10-04 19:31:36,804 INFO L226 Difference]: Without dead ends: 590 [2021-10-04 19:31:36,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 649.1ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-10-04 19:31:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-10-04 19:31:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 436. [2021-10-04 19:31:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.786206896551724) internal successors, (1212), 435 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1212 transitions. [2021-10-04 19:31:36,816 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1212 transitions. Word has length 21 [2021-10-04 19:31:36,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:36,817 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1212 transitions. [2021-10-04 19:31:36,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:36,817 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1212 transitions. [2021-10-04 19:31:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-04 19:31:36,819 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:36,819 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:36,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:37,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-04 19:31:37,034 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:37,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:37,035 INFO L82 PathProgramCache]: Analyzing trace with hash -240278418, now seen corresponding path program 35 times [2021-10-04 19:31:37,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:37,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172908004] [2021-10-04 19:31:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:37,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:31:37,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:37,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172908004] [2021-10-04 19:31:37,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172908004] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:37,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054983425] [2021-10-04 19:31:37,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:31:37,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:37,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:37,200 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:37,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-04 19:31:37,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-04 19:31:37,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:37,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-04 19:31:37,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:38,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054983425] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:38,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:38,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-10-04 19:31:38,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970265266] [2021-10-04 19:31:38,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-04 19:31:38,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-04 19:31:38,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:31:38,454 INFO L87 Difference]: Start difference. First operand 436 states and 1212 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:39,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:39,599 INFO L93 Difference]: Finished difference Result 664 states and 1827 transitions. [2021-10-04 19:31:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-04 19:31:39,600 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-04 19:31:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:39,605 INFO L225 Difference]: With dead ends: 664 [2021-10-04 19:31:39,605 INFO L226 Difference]: Without dead ends: 642 [2021-10-04 19:31:39,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1014.7ms TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2021-10-04 19:31:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-10-04 19:31:39,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 456. [2021-10-04 19:31:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.7736263736263735) internal successors, (1262), 455 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1262 transitions. [2021-10-04 19:31:39,619 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1262 transitions. Word has length 23 [2021-10-04 19:31:39,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:39,619 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1262 transitions. [2021-10-04 19:31:39,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1262 transitions. [2021-10-04 19:31:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-04 19:31:39,621 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:39,621 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:39,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-04 19:31:39,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-04 19:31:39,836 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:39,836 INFO L82 PathProgramCache]: Analyzing trace with hash 112719294, now seen corresponding path program 36 times [2021-10-04 19:31:39,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:39,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414805445] [2021-10-04 19:31:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:39,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:31:39,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:39,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414805445] [2021-10-04 19:31:39,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414805445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:39,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430586624] [2021-10-04 19:31:39,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:31:39,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:39,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:39,999 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:40,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-04 19:31:40,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-04 19:31:40,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:40,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-04 19:31:40,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:41,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430586624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:41,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:41,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-10-04 19:31:41,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996662441] [2021-10-04 19:31:41,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-04 19:31:41,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:41,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-04 19:31:41,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:31:41,210 INFO L87 Difference]: Start difference. First operand 456 states and 1262 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:42,351 INFO L93 Difference]: Finished difference Result 600 states and 1644 transitions. [2021-10-04 19:31:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-04 19:31:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-04 19:31:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:42,355 INFO L225 Difference]: With dead ends: 600 [2021-10-04 19:31:42,355 INFO L226 Difference]: Without dead ends: 578 [2021-10-04 19:31:42,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 993.0ms TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2021-10-04 19:31:42,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-10-04 19:31:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 356. [2021-10-04 19:31:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.7746478873239435) internal successors, (985), 355 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 985 transitions. [2021-10-04 19:31:42,365 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 985 transitions. Word has length 23 [2021-10-04 19:31:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:42,366 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 985 transitions. [2021-10-04 19:31:42,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 985 transitions. [2021-10-04 19:31:42,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-04 19:31:42,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:42,368 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:42,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:42,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-04 19:31:42,577 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:42,578 INFO L82 PathProgramCache]: Analyzing trace with hash -2025932931, now seen corresponding path program 37 times [2021-10-04 19:31:42,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:42,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147612160] [2021-10-04 19:31:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:42,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:31:42,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:42,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147612160] [2021-10-04 19:31:42,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147612160] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:42,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659045166] [2021-10-04 19:31:42,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:31:42,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:42,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:42,637 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:42,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-04 19:31:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-04 19:31:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:31:43,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659045166] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:43,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:43,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-10-04 19:31:43,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205161804] [2021-10-04 19:31:43,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-04 19:31:43,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:43,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-04 19:31:43,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-04 19:31:43,420 INFO L87 Difference]: Start difference. First operand 356 states and 985 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:43,469 INFO L93 Difference]: Finished difference Result 460 states and 1212 transitions. [2021-10-04 19:31:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-04 19:31:43,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-04 19:31:43,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:43,473 INFO L225 Difference]: With dead ends: 460 [2021-10-04 19:31:43,473 INFO L226 Difference]: Without dead ends: 460 [2021-10-04 19:31:43,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-04 19:31:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-10-04 19:31:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 316. [2021-10-04 19:31:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.7587301587301587) internal successors, (869), 315 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 869 transitions. [2021-10-04 19:31:43,483 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 869 transitions. Word has length 23 [2021-10-04 19:31:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:43,483 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 869 transitions. [2021-10-04 19:31:43,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 869 transitions. [2021-10-04 19:31:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-04 19:31:43,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:43,484 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:43,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:43,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:43,685 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:43,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:43,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2002603838, now seen corresponding path program 38 times [2021-10-04 19:31:43,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:43,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3156414] [2021-10-04 19:31:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:43,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-04 19:31:43,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:43,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3156414] [2021-10-04 19:31:43,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3156414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:43,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567827181] [2021-10-04 19:31:43,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:31:43,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:43,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:43,856 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:43,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-04 19:31:44,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:31:44,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:44,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-04 19:31:44,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:45,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567827181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:45,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:45,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-04 19:31:45,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630429085] [2021-10-04 19:31:45,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-04 19:31:45,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:45,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-04 19:31:45,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-10-04 19:31:45,049 INFO L87 Difference]: Start difference. First operand 316 states and 869 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:46,451 INFO L93 Difference]: Finished difference Result 550 states and 1479 transitions. [2021-10-04 19:31:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-04 19:31:46,451 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-04 19:31:46,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:46,455 INFO L225 Difference]: With dead ends: 550 [2021-10-04 19:31:46,455 INFO L226 Difference]: Without dead ends: 484 [2021-10-04 19:31:46,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1101.5ms TimeCoverageRelationStatistics Valid=301, Invalid=2149, Unknown=0, NotChecked=0, Total=2450 [2021-10-04 19:31:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-10-04 19:31:46,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 408. [2021-10-04 19:31:46,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.7223587223587224) internal successors, (1108), 407 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:46,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1108 transitions. [2021-10-04 19:31:46,464 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1108 transitions. Word has length 23 [2021-10-04 19:31:46,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:46,465 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1108 transitions. [2021-10-04 19:31:46,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:46,465 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1108 transitions. [2021-10-04 19:31:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-04 19:31:46,467 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:46,467 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:46,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:46,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-04 19:31:46,678 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:46,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash -892996478, now seen corresponding path program 39 times [2021-10-04 19:31:46,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:46,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350736556] [2021-10-04 19:31:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:46,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:31:46,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:46,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350736556] [2021-10-04 19:31:46,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350736556] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:46,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287403506] [2021-10-04 19:31:46,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:31:46,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:46,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:46,841 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:46,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-04 19:31:47,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-04 19:31:47,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:47,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-04 19:31:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:48,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287403506] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:48,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:48,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-04 19:31:48,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573051387] [2021-10-04 19:31:48,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-04 19:31:48,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-04 19:31:48,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:31:48,128 INFO L87 Difference]: Start difference. First operand 408 states and 1108 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:48,870 INFO L93 Difference]: Finished difference Result 630 states and 1681 transitions. [2021-10-04 19:31:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-04 19:31:48,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-04 19:31:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:48,875 INFO L225 Difference]: With dead ends: 630 [2021-10-04 19:31:48,875 INFO L226 Difference]: Without dead ends: 600 [2021-10-04 19:31:48,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 600.3ms TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2021-10-04 19:31:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-10-04 19:31:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 414. [2021-10-04 19:31:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.738498789346247) internal successors, (1131), 413 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1131 transitions. [2021-10-04 19:31:48,886 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1131 transitions. Word has length 23 [2021-10-04 19:31:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:48,886 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1131 transitions. [2021-10-04 19:31:48,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1131 transitions. [2021-10-04 19:31:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-04 19:31:48,888 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:48,889 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:48,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-04 19:31:49,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:49,103 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:49,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:49,103 INFO L82 PathProgramCache]: Analyzing trace with hash 698309458, now seen corresponding path program 40 times [2021-10-04 19:31:49,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:49,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72450791] [2021-10-04 19:31:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:49,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:31:49,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:49,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72450791] [2021-10-04 19:31:49,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72450791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:49,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242871026] [2021-10-04 19:31:49,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:31:49,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:49,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:49,269 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:49,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-04 19:31:50,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:31:50,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:50,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-04 19:31:50,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:50,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242871026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:50,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:50,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-10-04 19:31:50,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128523373] [2021-10-04 19:31:50,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-04 19:31:50,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:50,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-04 19:31:50,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-10-04 19:31:50,557 INFO L87 Difference]: Start difference. First operand 414 states and 1131 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:51,718 INFO L93 Difference]: Finished difference Result 657 states and 1776 transitions. [2021-10-04 19:31:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-04 19:31:51,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-04 19:31:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:51,723 INFO L225 Difference]: With dead ends: 657 [2021-10-04 19:31:51,723 INFO L226 Difference]: Without dead ends: 600 [2021-10-04 19:31:51,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 964.8ms TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2021-10-04 19:31:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-10-04 19:31:51,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 370. [2021-10-04 19:31:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.6910569105691056) internal successors, (993), 369 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 993 transitions. [2021-10-04 19:31:51,735 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 993 transitions. Word has length 23 [2021-10-04 19:31:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:51,736 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 993 transitions. [2021-10-04 19:31:51,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 993 transitions. [2021-10-04 19:31:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-04 19:31:51,737 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:51,738 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:51,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-04 19:31:51,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:51,942 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:51,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1857681204, now seen corresponding path program 41 times [2021-10-04 19:31:51,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:51,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432267347] [2021-10-04 19:31:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:51,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:51,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:51,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432267347] [2021-10-04 19:31:51,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432267347] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:51,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001775952] [2021-10-04 19:31:51,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:31:51,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:51,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:51,994 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:52,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-04 19:31:52,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-04 19:31:52,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:52,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-04 19:31:52,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:53,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001775952] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:53,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:53,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 19 [2021-10-04 19:31:53,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430560597] [2021-10-04 19:31:53,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-04 19:31:53,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:53,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-04 19:31:53,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:31:53,363 INFO L87 Difference]: Start difference. First operand 370 states and 993 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:53,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:53,989 INFO L93 Difference]: Finished difference Result 606 states and 1587 transitions. [2021-10-04 19:31:53,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-04 19:31:53,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-04 19:31:53,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:53,994 INFO L225 Difference]: With dead ends: 606 [2021-10-04 19:31:53,994 INFO L226 Difference]: Without dead ends: 606 [2021-10-04 19:31:53,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 462.9ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-10-04 19:31:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-10-04 19:31:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 450. [2021-10-04 19:31:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.683741648106904) internal successors, (1205), 449 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1205 transitions. [2021-10-04 19:31:54,008 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1205 transitions. Word has length 25 [2021-10-04 19:31:54,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:54,009 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 1205 transitions. [2021-10-04 19:31:54,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1205 transitions. [2021-10-04 19:31:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-04 19:31:54,011 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:54,011 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:54,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-04 19:31:54,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:54,225 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:54,226 INFO L82 PathProgramCache]: Analyzing trace with hash 504171361, now seen corresponding path program 42 times [2021-10-04 19:31:54,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:54,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222414869] [2021-10-04 19:31:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:54,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-04 19:31:54,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:54,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222414869] [2021-10-04 19:31:54,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222414869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:54,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351116138] [2021-10-04 19:31:54,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:31:54,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:54,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:54,436 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:54,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-04 19:31:55,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-04 19:31:55,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:31:55,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-04 19:31:55,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:55,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351116138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:55,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:55,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-10-04 19:31:55,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616914830] [2021-10-04 19:31:55,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-04 19:31:55,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:55,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-04 19:31:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-10-04 19:31:55,872 INFO L87 Difference]: Start difference. First operand 450 states and 1205 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:31:57,443 INFO L93 Difference]: Finished difference Result 790 states and 2070 transitions. [2021-10-04 19:31:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-04 19:31:57,444 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-04 19:31:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:31:57,449 INFO L225 Difference]: With dead ends: 790 [2021-10-04 19:31:57,449 INFO L226 Difference]: Without dead ends: 702 [2021-10-04 19:31:57,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1411.7ms TimeCoverageRelationStatistics Valid=344, Invalid=2736, Unknown=0, NotChecked=0, Total=3080 [2021-10-04 19:31:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-10-04 19:31:57,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 580. [2021-10-04 19:31:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.6632124352331608) internal successors, (1542), 579 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1542 transitions. [2021-10-04 19:31:57,464 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1542 transitions. Word has length 25 [2021-10-04 19:31:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:31:57,464 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 1542 transitions. [2021-10-04 19:31:57,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:31:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1542 transitions. [2021-10-04 19:31:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-04 19:31:57,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:31:57,466 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:31:57,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-04 19:31:57,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-04 19:31:57,667 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:31:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:31:57,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1613778721, now seen corresponding path program 43 times [2021-10-04 19:31:57,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:31:57,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196167835] [2021-10-04 19:31:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:31:57,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:31:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:31:57,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:31:57,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196167835] [2021-10-04 19:31:57,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196167835] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:57,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141944269] [2021-10-04 19:31:57,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:31:57,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:31:57,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:31:57,857 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:31:57,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-04 19:31:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:31:58,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-04 19:31:58,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:31:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:31:59,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141944269] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:31:59,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:31:59,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-10-04 19:31:59,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845758192] [2021-10-04 19:31:59,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-04 19:31:59,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:31:59,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-04 19:31:59,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-10-04 19:31:59,362 INFO L87 Difference]: Start difference. First operand 580 states and 1542 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:32:00,153 INFO L93 Difference]: Finished difference Result 870 states and 2279 transitions. [2021-10-04 19:32:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-04 19:32:00,153 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-04 19:32:00,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:32:00,175 INFO L225 Difference]: With dead ends: 870 [2021-10-04 19:32:00,175 INFO L226 Difference]: Without dead ends: 840 [2021-10-04 19:32:00,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 800.8ms TimeCoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2021-10-04 19:32:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-10-04 19:32:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 578. [2021-10-04 19:32:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.6707105719237436) internal successors, (1541), 577 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1541 transitions. [2021-10-04 19:32:00,193 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1541 transitions. Word has length 25 [2021-10-04 19:32:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:32:00,194 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1541 transitions. [2021-10-04 19:32:00,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:00,194 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1541 transitions. [2021-10-04 19:32:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-04 19:32:00,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:32:00,195 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:32:00,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-04 19:32:00,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-04 19:32:00,396 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:32:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:32:00,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1089882639, now seen corresponding path program 44 times [2021-10-04 19:32:00,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:32:00,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195020272] [2021-10-04 19:32:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:32:00,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:32:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:32:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:32:00,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:32:00,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195020272] [2021-10-04 19:32:00,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195020272] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:32:00,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863259000] [2021-10-04 19:32:00,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:32:00,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:32:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:32:00,574 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:32:00,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-04 19:32:01,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:32:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:32:01,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-04 19:32:01,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:32:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:32:02,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863259000] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:32:02,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:32:02,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-10-04 19:32:02,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657231298] [2021-10-04 19:32:02,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-04 19:32:02,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:32:02,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-04 19:32:02,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-10-04 19:32:02,060 INFO L87 Difference]: Start difference. First operand 578 states and 1541 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:32:03,442 INFO L93 Difference]: Finished difference Result 941 states and 2482 transitions. [2021-10-04 19:32:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-04 19:32:03,443 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-04 19:32:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:32:03,448 INFO L225 Difference]: With dead ends: 941 [2021-10-04 19:32:03,449 INFO L226 Difference]: Without dead ends: 880 [2021-10-04 19:32:03,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1172.8ms TimeCoverageRelationStatistics Valid=297, Invalid=2055, Unknown=0, NotChecked=0, Total=2352 [2021-10-04 19:32:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-10-04 19:32:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 554. [2021-10-04 19:32:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.6491862567811935) internal successors, (1465), 553 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1465 transitions. [2021-10-04 19:32:03,463 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1465 transitions. Word has length 25 [2021-10-04 19:32:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:32:03,464 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1465 transitions. [2021-10-04 19:32:03,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:03,464 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1465 transitions. [2021-10-04 19:32:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-04 19:32:03,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:32:03,466 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:32:03,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-04 19:32:03,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:32:03,667 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:32:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:32:03,668 INFO L82 PathProgramCache]: Analyzing trace with hash 857169073, now seen corresponding path program 45 times [2021-10-04 19:32:03,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:32:03,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779778181] [2021-10-04 19:32:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:32:03,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:32:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:32:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-04 19:32:03,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:32:03,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779778181] [2021-10-04 19:32:03,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779778181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:32:03,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63099986] [2021-10-04 19:32:03,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:32:03,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:32:03,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:32:03,877 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:32:03,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-04 19:32:04,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-04 19:32:04,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:32:04,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-04 19:32:04,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:32:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:32:05,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63099986] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:32:05,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:32:05,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-04 19:32:05,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043031208] [2021-10-04 19:32:05,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-04 19:32:05,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:32:05,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-04 19:32:05,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-10-04 19:32:05,426 INFO L87 Difference]: Start difference. First operand 554 states and 1465 transitions. Second operand has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:06,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:32:06,959 INFO L93 Difference]: Finished difference Result 660 states and 1689 transitions. [2021-10-04 19:32:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-04 19:32:06,959 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-04 19:32:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:32:06,964 INFO L225 Difference]: With dead ends: 660 [2021-10-04 19:32:06,964 INFO L226 Difference]: Without dead ends: 578 [2021-10-04 19:32:06,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1415.0ms TimeCoverageRelationStatistics Valid=336, Invalid=2634, Unknown=0, NotChecked=0, Total=2970 [2021-10-04 19:32:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-10-04 19:32:06,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 474. [2021-10-04 19:32:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.5813953488372094) internal successors, (1221), 473 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:06,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1221 transitions. [2021-10-04 19:32:06,979 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1221 transitions. Word has length 25 [2021-10-04 19:32:06,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:32:06,979 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1221 transitions. [2021-10-04 19:32:06,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1221 transitions. [2021-10-04 19:32:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-04 19:32:06,982 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:32:06,982 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:32:07,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-04 19:32:07,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-04 19:32:07,198 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:32:07,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:32:07,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1966776433, now seen corresponding path program 46 times [2021-10-04 19:32:07,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:32:07,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013869338] [2021-10-04 19:32:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:32:07,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:32:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:32:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:32:07,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:32:07,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013869338] [2021-10-04 19:32:07,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013869338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:32:07,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723944516] [2021-10-04 19:32:07,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:32:07,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:32:07,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:32:07,415 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:32:07,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-04 19:32:08,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:32:08,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:32:08,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-04 19:32:08,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:32:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:32:08,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723944516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:32:08,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:32:08,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-10-04 19:32:08,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555667332] [2021-10-04 19:32:08,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-04 19:32:08,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:32:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-04 19:32:08,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-10-04 19:32:08,977 INFO L87 Difference]: Start difference. First operand 474 states and 1221 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:10,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:32:10,013 INFO L93 Difference]: Finished difference Result 682 states and 1740 transitions. [2021-10-04 19:32:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-04 19:32:10,014 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-04 19:32:10,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:32:10,016 INFO L225 Difference]: With dead ends: 682 [2021-10-04 19:32:10,017 INFO L226 Difference]: Without dead ends: 660 [2021-10-04 19:32:10,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1014.7ms TimeCoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2021-10-04 19:32:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-10-04 19:32:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 348. [2021-10-04 19:32:10,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.547550432276657) internal successors, (884), 347 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:10,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 884 transitions. [2021-10-04 19:32:10,026 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 884 transitions. Word has length 25 [2021-10-04 19:32:10,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:32:10,026 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 884 transitions. [2021-10-04 19:32:10,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 884 transitions. [2021-10-04 19:32:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-04 19:32:10,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:32:10,028 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:32:10,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-04 19:32:10,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:32:10,229 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 19:32:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:32:10,230 INFO L82 PathProgramCache]: Analyzing trace with hash -736884927, now seen corresponding path program 47 times [2021-10-04 19:32:10,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:32:10,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611485201] [2021-10-04 19:32:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:32:10,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:32:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:32:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:32:10,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:32:10,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611485201] [2021-10-04 19:32:10,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611485201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:32:10,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599977098] [2021-10-04 19:32:10,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:32:10,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:32:10,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:32:10,424 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:32:10,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-04 19:32:11,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-04 19:32:11,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:32:11,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-04 19:32:11,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:32:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:32:12,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599977098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:32:12,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:32:12,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-10-04 19:32:12,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086716867] [2021-10-04 19:32:12,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-04 19:32:12,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:32:12,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-04 19:32:12,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-10-04 19:32:12,023 INFO L87 Difference]: Start difference. First operand 348 states and 884 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:13,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:32:13,118 INFO L93 Difference]: Finished difference Result 394 states and 997 transitions. [2021-10-04 19:32:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 19:32:13,118 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-04 19:32:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:32:13,119 INFO L225 Difference]: With dead ends: 394 [2021-10-04 19:32:13,119 INFO L226 Difference]: Without dead ends: 0 [2021-10-04 19:32:13,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1081.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2021-10-04 19:32:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-04 19:32:13,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-04 19:32:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-04 19:32:13,120 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-10-04 19:32:13,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:32:13,120 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-04 19:32:13,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:32:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-04 19:32:13,121 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-04 19:32:13,124 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-04 19:32:13,125 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-04 19:32:13,125 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-04 19:32:13,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-04 19:32:13,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-04 19:32:13,341 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-04 19:32:13,341 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-04 19:32:13,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 07:32:13 BasicIcfg [2021-10-04 19:32:13,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-04 19:32:13,344 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-04 19:32:13,344 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-04 19:32:13,344 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-04 19:32:13,345 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 07:30:33" (3/4) ... [2021-10-04 19:32:13,348 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-04 19:32:13,357 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-04 19:32:13,357 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-04 19:32:13,363 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-04 19:32:13,364 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-04 19:32:13,364 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-04 19:32:13,399 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-04 19:32:13,399 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-04 19:32:13,401 INFO L168 Benchmark]: Toolchain (without parser) took 100574.39 ms. Allocated memory was 50.3 MB in the beginning and 474.0 MB in the end (delta: 423.6 MB). Free memory was 26.3 MB in the beginning and 165.6 MB in the end (delta: -139.3 MB). Peak memory consumption was 285.4 MB. Max. memory is 16.1 GB. [2021-10-04 19:32:13,401 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 41.9 MB. Free memory is still 19.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-04 19:32:13,402 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.18 ms. Allocated memory is still 50.3 MB. Free memory was 25.9 MB in the beginning and 27.3 MB in the end (delta: -1.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-10-04 19:32:13,402 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.82 ms. Allocated memory is still 50.3 MB. Free memory was 27.3 MB in the beginning and 25.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-04 19:32:13,403 INFO L168 Benchmark]: Boogie Preprocessor took 27.13 ms. Allocated memory is still 50.3 MB. Free memory was 25.7 MB in the beginning and 24.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-04 19:32:13,403 INFO L168 Benchmark]: RCFGBuilder took 554.47 ms. Allocated memory is still 50.3 MB. Free memory was 24.6 MB in the beginning and 24.2 MB in the end (delta: 453.3 kB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-10-04 19:32:13,404 INFO L168 Benchmark]: TraceAbstraction took 99585.68 ms. Allocated memory was 50.3 MB in the beginning and 474.0 MB in the end (delta: 423.6 MB). Free memory was 23.7 MB in the beginning and 168.7 MB in the end (delta: -145.1 MB). Peak memory consumption was 277.0 MB. Max. memory is 16.1 GB. [2021-10-04 19:32:13,404 INFO L168 Benchmark]: Witness Printer took 55.53 ms. Allocated memory is still 474.0 MB. Free memory was 168.7 MB in the beginning and 165.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-04 19:32:13,406 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 41.9 MB. Free memory is still 19.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 300.18 ms. Allocated memory is still 50.3 MB. Free memory was 25.9 MB in the beginning and 27.3 MB in the end (delta: -1.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.82 ms. Allocated memory is still 50.3 MB. Free memory was 27.3 MB in the beginning and 25.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.13 ms. Allocated memory is still 50.3 MB. Free memory was 25.7 MB in the beginning and 24.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 554.47 ms. Allocated memory is still 50.3 MB. Free memory was 24.6 MB in the beginning and 24.2 MB in the end (delta: 453.3 kB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 99585.68 ms. Allocated memory was 50.3 MB in the beginning and 474.0 MB in the end (delta: 423.6 MB). Free memory was 23.7 MB in the beginning and 168.7 MB in the end (delta: -145.1 MB). Peak memory consumption was 277.0 MB. Max. memory is 16.1 GB. * Witness Printer took 55.53 ms. Allocated memory is still 474.0 MB. Free memory was 168.7 MB in the beginning and 165.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2159.4ms, 71 PlacesBefore, 23 PlacesAfterwards, 71 TransitionsBefore, 19 TransitionsAfterwards, 282 CoEnabledTransitionPairs, 6 FixpointIterations, 43 TrivialSequentialCompositions, 10 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 546 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 451, positive: 425, positive conditional: 0, positive unconditional: 425, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 191, positive: 188, positive conditional: 0, positive unconditional: 188, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 191, positive: 182, positive conditional: 0, positive unconditional: 182, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 9, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 19, positive: 12, positive conditional: 0, positive unconditional: 12, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 451, positive: 237, positive conditional: 0, positive unconditional: 237, negative: 23, negative conditional: 0, negative unconditional: 23, unknown: 191, unknown conditional: 0, unknown unconditional: 191] , Statistics on independence cache: Total cache size (in pairs): 37, Positive cache size: 35, Positive conditional cache size: 0, Positive unconditional cache size: 35, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 58]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 77 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 99403.4ms, OverallIterations: 49, TraceHistogramMax: 4, EmptinessCheckTime: 75.3ms, AutomataDifference: 35861.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2219.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1124 SDtfs, 4661 SDslu, 9873 SDs, 0 SdLazy, 21120 SolverSat, 1283 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11472.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2112 GetRequests, 594 SyntacticMatches, 20 SemanticMatches, 1498 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13400 ImplicationChecksByTransitivity, 31145.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=580occurred in iteration=44, InterpolantAutomatonStates: 1078, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 614.7ms AutomataMinimizationTime, 49 MinimizatonAttempts, 5706 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 292.3ms SsaConstructionTime, 1504.8ms SatisfiabilityAnalysisTime, 26398.4ms InterpolantComputationTime, 1967 NumberOfCodeBlocks, 1967 NumberOfCodeBlocksAsserted, 179 NumberOfCheckSat, 1872 ConstructedInterpolants, 0 QuantifiedInterpolants, 25973 SizeOfPredicates, 94 NumberOfNonLiveVariables, 4689 ConjunctsInSsa, 1418 ConjunctsInUnsatCore, 95 InterpolantComputations, 3 PerfectInterpolantSequences, 128/1289 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-04 19:32:13,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...